Matulay JT and Kamat AM. Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.12688/f1000research.14903.1)
NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article.
1Department of Urology, Division of Surgery, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Suite 853, Houston, TX, 77030, USA
Justin T. Matulay
Roles:
Conceptualization,
Data Curation,
Formal Analysis,
Investigation,
Methodology,
Writing – Original Draft Preparation,
Writing – Review & Editing
Ashish M. Kamat
Roles:
Conceptualization,
Investigation,
Methodology,
Supervision,
Writing – Original Draft Preparation,
Writing – Review & Editing
OPEN PEER REVIEW
REVIEWER STATUS
Abstract
Bladder cancer is a heterogeneous disease that poses unique challenges to the treating clinician. It can be limited to a relatively indolent papillary tumor with low potential for progression beyond this stage to muscle-invasive disease prone to distant metastasis. The former is best treated as conservatively as possible, whereas the latter requires aggressive surgical intervention with adjuvant therapies in order to provide the best clinical outcomes. Risk stratification traditionally uses clinicopathologic features of the disease to provide prognostic information that assists in choosing the best therapy for each individual patient. For bladder cancer, this informs decisions regarding the type of intravesical therapy that is most appropriate for non-muscle-invasive disease or whether or not to administer neoadjuvant chemotherapy prior to radical cystectomy. More recently, tumor genetic sequencing data have been married to clinical outcomes data to add further sophistication and personalization. In the next generation of risk classification, we are likely to see the inclusion of molecular subtyping with specific treatment considerations based on a tumor’s mutational profile.
Corresponding author:
Ashish M. Kamat
Competing interests:
AMK is a consultant to TMC Innovation, Merck, BMS, Arquer, MDxHealth, Photocure, Theralase, Cepheid, Medac, Asieris, Pfizer, and Astra Zeneca and has received research funding from FKD, Merck, Telesta, and Adolo. JTM has no competing interests to declare.
Grant information:
AMK is supported by the Wayne B. Duddlesten Professorship and a Floyd Family Foundation Grant.
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Bladder cancer ranks among the most common non-cutaneous malignancies in the United States (4th for men and 11th for women) and worldwide (6th for men and 16th for women)1–3. Though it is commonly referred to by the generic term “bladder cancer”, urothelial neoplasms represent a broad spectrum of disease with vastly different treatment pathways from routine bladder surveillance to intravesical therapy to radical surgery with chemotherapy. Staging is broadly divided into two major categories—non-muscle-invasive bladder cancer (NMIBC) and muscle-invasive bladder cancer (MIBC)—which is perhaps the most important determining factor when choosing an initial therapy. Tumor stage is classified according to the Tumor-Node-Metastasis staging system developed by a collaboration of the American Joint Commission on Cancer and Union for International Cancer Control, now in its 8th edition which went into effect in January 20184. Tumors categorized as NMIBC include carcinoma in situ (CIS), papillary (Ta), or invasive into or beyond the lamina propria (T1). Once the tumor invades the muscularis propria (T2) or beyond (T3 and T4), it is considered MIBC. Somewhat confusingly, these have been referred to as “superficial” and “invasive” disease, respectively, though that practice has been abandoned more recently for the sake of clarity. The tumor grade, describing the aggressiveness of tumor cells based on microscopic appearance, is also very important for the prognosis of bladder cancer. The 2016 World Health Organization classification system for urothelial carcinoma is divided into a binary system of high and low grade, though this is mainly applicable to Ta tumors, since nearly all (≥95%) disease ≥T1 is high grade and CIS is high grade by definition5.
Diagnosis
A complete clinical assessment for bladder cancer includes history, physical exam, imaging of the upper urinary tracts, and cystoscopy. Cystoscopy is the cornerstone in the diagnosis and treatment of bladder cancer, being used in virtually all patients at some point throughout the course of their disease. Traditionally, this is carried out using a standard light source (“white light”) to illuminate an endoscopic lens with the subsequent image transmitted via a camera head to a monitor. Directly visualized tumors are then biopsied, fulgurated, and/or resected to provide staging information that forms the basis for widely different treatments (i.e. surveillance versus radical cystectomy). Low-grade, papillary tumors not invading into the lamina propria (Ta) are reliably eradicated in a single setting; however, more advanced disease (high-grade and/or T1) is often incompletely resected. Studies have found residual disease to be present in 40–78% of re-transurethral resection (TUR) specimens after original diagnosis of high-grade Ta or any T1, with an upgrading rate to muscle invasion of 2% and 14%, respectively6–9. This fact has led to the recommendation by leading urologic organizations that all patients with T1 tumors should undergo a repeat resection within 6 weeks of the original procedure to confirm tumor stage and ensure maximal removal of any residual disease, as this improves response to intravesical therapy10,11. Recent technological advances, referred to as photodynamic aids (i.e. Blue Light® cystoscopy and narrow band imaging), promise improved detection over traditional white light cystoscopy alone, theoretically allowing for a more complete endoscopic tumor removal and more accurate risk assessment12–19.
The urothelium is not limited to the bladder and urethra; it also extends into the ureters and renal collecting system. The main purpose of imaging in the diagnostic evaluation of bladder cancer is to assess the upper urinary tracts for malignancy and for staging local and distant extent of disease. Computed tomographic urography, which uses intravenous contrast with delayed image acquisition (10–15 minutes) to allow for urinary excretion, has the highest diagnostic value for the detection of upper tract malignancy with a sensitivity of 67–100% and a specificity of 93–99%20–23. Magnetic resonance imaging is a viable alternative in patients with iodinated contrast allergy with a diagnostic accuracy of 84–92%, though it is more time intensive and still requires a contrast agent (gadolinium) and, therefore, is a poor choice in patients with significantly impaired renal function24. Ultrasonography plus retrograde pyelography at the time of cystoscopy can be used if cross-sectional imaging is otherwise contraindicated, but this is suboptimal for assessing disease extent and upper tract involvement, so it is reserved for special circumstances. Upper tract evaluation is recommended as part of initial diagnostic work-up by the American Urological Association (AUA) and European Association of Urology (EAU) despite the very low likelihood of finding synchronous upper tract tumor at the time of NMIBC diagnosis (1.5%); however, certain features like multifocality, trigonal location, and CIS increase the risk (7.5%)10,11,25,26. A more nuanced approach to long-term surveillance is favored over repeat imaging, being applied only to patients with high-risk tumors, and is our first example of a risk-adapted approach to bladder cancer.
Risk stratification in bladder cancer
Not all bladder cancers are created equal and, therefore, risk stratification is an important tool for achieving optimal patient outcomes while avoiding overtreatment. Formal classification systems exist for NMIBC given the wide variability in possible treatment options (surveillance to radical cystectomy), but a one-size-fits-all approach to MIBC is no longer appropriate either.
Non-muscle-invasive bladder cancer
The risk tables from the European Organization for Research and Treatment of Cancer (EORTC) and scoring system from the Spanish Urological Club for Oncological Treatment (CUETO) for NMIBC classify patients into low, intermediate, or high risk for recurrence and progression to muscle invasion based on factors including grade, stage, tumor size, multifocality, variant histology, lymphovascular invasion, and prior therapy10,11,27,28. Validation studies based on these tools have shown consistent overestimation of recurrence and progression rates among the high-risk group, likely owing to the suboptimal administration of intravesical therapy seen in the developmental cohorts29–32. Though there is now widespread acceptance of induction intravesical immunotherapy (bacillus Calmette-Guérin [BCG]) plus maintenance therapy for 1 to 3 years based on the results of the randomized Southwest Oncology Group (SWOG) protocol, patients from EORTC and CUETO were largely treated with intravesical chemotherapies (mitomycin C, epirubicin, thiotepa, etc.) or a lack of appropriate maintenance BCG33. Despite the limitations of both aforementioned studies, they form the foundation for the risk stratification systems used by the EAU and AUA to help guide treatment decisions (Table 1)10,11,34.
Table 1. Risk stratification of non-muscle-invasive bladder cancer10,11.
• Primary, • Solitary (<3 cm), • Low-grade/G1, and • Ta
• Single immediate post-TUR instillation of chemotherapy
• Solitary <3 cm, • Low-grade, and • Ta
• Single immediate post-TUR instillation of chemotherapy
Intermediate
• Any disease not fitting low- or high-risk criteria
• Single immediate post-TUR instillation of chemotherapy, and either • Induction chemotherapy for 1 year, or • Induction BCG with 1 year of maintenance therapy
• Low-grade Ta recurrence <1 year • Solitary low-grade Ta >3 cm, • Multifocal low-grade Ta, • High-grade Ta ≤3 cm, or • Low-grade T1
• Single immediate post-TUR instillation of chemotherapy, and either • Induction chemotherapy with or without maintenance, or • Induction BCG with maintenance
High
• Any T1, or • High-grade/G3, or • CIS present, or • Multiple, recurrent, large (>3 cm), papillary (Ta), low-grade/G1 or G2 tumors
• Single immediate post-TUR instillation of chemotherapy, and either • Induction BCG with 1–3 years of maintenance therapy, or • Immediate radical cystectomy
• High-grade T1 • Recurrent high-grade Ta • High-grade Ta >3 cm • CIS • Any high-grade failing BCG • Variant histology • LVI • High-grade prostatic urethral involvement
• Induction BCG with maintenance therapy, or • Immediate radical cystectomy for highest risk features (with LVI, variant histology, T1 with CIS, persistent T1 on re-TUR)
AUA, American Urological Association; BCG, bacillus Calmette-Guérin; CIS, carcinoma in situ; EAU, European Association of Urology; LVI, lymphovascular invasion; TUR, transurethral resection
There is general agreement among urological organizations that a more-conservative approach to treatment (cystoscopic resection and single-dose intravesical chemotherapy) is warranted for low-risk tumors (solitary, low-grade, papillary), while the high-risk group (multifocal high-grade, CIS, or any T1) should be managed aggressively through the use of intravesical immunotherapy, and even radical cystectomy in some cases10,11. This leaves a broad middle ground for intermediate-risk disease, representing a spectrum ranging from a small, recurrent low-grade papillary tumor to large treatment-resistant low-grade tumors to small high-grade lesions. In order to more effectively tailor an appropriate treatment regimen for these patients, further substratification of intermediate-risk bladder cancer has been proposed by an international consortium of bladder cancer experts using a simple scoring system based on four main tumor features (Figure 1)35.
Figure 1. Proposed substratification of intermediate-risk non-muscle-invasive bladder cancer (NMIBC) based on the recommendations of the International Bladder Cancer Group35.
BCG, bacillus Calmette-Guérin; TURBT, transurethral resection of bladder tumor.
Muscle-invasive bladder cancer
MIBC is often treated as a single disease entity with only one acceptable therapy in the form of neoadjuvant chemotherapy followed by radical cystectomy with urinary diversion and lymphadenectomy36. However, risk assessment can be applied before or after definitive therapy to identify which patients require the most aggressive approach, specifically those that include adjuvant treatments with significant added toxicity. For example, the decision to delay radical cystectomy so that neoadjuvant chemotherapy can be administered for a small—5% absolute improvement in overall survival at 5 years—but statistically significant benefit can be more precisely applied only to patients with the highest chance of seeing a benefit37. This topic will be re-addressed in more detail in a later section. Although lacking consensus recommendations for risk grouping from any major urological societies, the stratification and personalization of MIBC therapy is on the verge of a significant paradigm shift supported by a growing body of genomic data.
Pathologic subtypes
The most common histology of bladder cancer is urothelial carcinoma (~90%) followed by squamous, adenocarcinoma, micropapillary, small cell, and other rare tumors38. Not all urothelial carcinoma exists in pure form; instead divergent differentiation may occur within the tumor exhibiting different morphology and labeled as “variant histology”5. Of these variants, several are worth noting, as certain subtypes are known to be associated with a more aggressive clinical course. When taken as a group, variant histology is associated with more advanced stage at diagnosis and may not be amenable to standard treatment algorithms, even when adjusting for stage. For instance, plasmacytoid is particularly aggressive with up to 90% diagnosed with extension outside of the bladder (≥T3) and poor responsiveness to cisplatinum-based adjuvant chemotherapy following radical cystectomy39–41. Early cystectomy appears to offer survival advantage for micropapillary disease, even for clinical stage T1, because of a high rate of pathologic upstaging and node positivity42–46. Squamous differentiation, the most recognized subtype, and glandular are often reported on pathology reports; however, clinical outcomes are no different than those for conventional urothelial carcinoma47,48. These should also be recognized as very different to pure squamous cell carcinoma and adenocarcinoma of the bladder, which are distinct histologic entities lacking urothelial components49,50. Other less-common variants worth mentioning include nested, lymphoepithelioma-like, and small cell, the latter being morphologically similar to the lung cancer version and sharing the same aggressive clinical course51,52.
Molecular subtyping
MIBC ranks among the most highly mutated cancers, with frequencies similar to non-small cell lung cancers and head and neck squamous cell carcinoma, resulting in a heterogeneous mutational profile involving numerous cellular pathways53–56. Investigators from around the world have taken on the task of genetically characterizing MIBC samples, resulting in the publication of several major molecular classification systems (the Cancer Genome Atlas [TCGA], Lund, University of North Carolina, MD Anderson, etc.)55,57–59. Each analysis yielded groups of tumors enriched with certain mutations that shared common features with other carcinomas, specifically the breast cancer “basal” and “luminal” subtypes, which led to similarities in the naming schemes. Broadly speaking, basal tumors tend to exhibit a more aggressive phenotype than do luminal tumors and are more prone to metastasis at the time of diagnosis55–60. The major publications on this topic have each included a classification system with more-or-less overlap in the mutational profile—i.e. basal-like (UNC), UroB (Lund), Cluster III (TCGA), etc.—that correlates with clinical outcomes. An effort to achieve consensus definitions for all subtypes is underway, thus far producing the Basal-Squamous-like group (BASQ) with elevated KRT5/6 and KRT14 expression but low FOXA1 and GATA3 expression61. By using the information from cohorts like TCGA, several researchers have sought to define the prognostic significance of these genetic mutations through the creation of molecular subtypes with correlation with clinical outcomes56–58,62,63.
The association of molecular subtypes with response to bladder cancer therapy is certain to help guide treatment in the near future: for instance, which patients are most likely to benefit from neoadjuvant chemotherapy prior to surgery or response to immunotherapy over conventional chemotherapy56,57,64. Systemic therapy for bladder cancer can then be more carefully tailored to the individual patient using information obtained from genetic sequencing to select the best candidates for a given treatment regimen (Figure 2). For example, tumors exhibiting mutations in genes associated with DNA damage repair (i.e. ERCC2, ERBB2, ATM, and RB1) or those grouped into the basal/squamous subtype display a greater degree of cisplatinum sensitivity as demonstrated by more favorable clinical outcomes among these patients56,57,65–68. The luminal-papillary and luminal-infiltrated subtypes, on the other hand, show poor response to neoadjuvant chemotherapy; however, tumors with upregulation of the immune checkpoint markers (luminal-infiltrated and basal/squamous) may benefit from treatment with anti-PD-L1, PD-1, and/or CTLA-4 immunotherapy56,69.
Figure 2. Molecular subtypes of muscle-invasive bladder cancer with associated clinicopathologic and genomic characteristics.
Proposed treatment considerations are listed for each subtype based on available clinical data53–57,63,64,66–69. CIS, carcinoma in situ; CTLA-4, cytotoxic T-lymphocyte-associated antigen 4; DLX6, distal-less homeobox 6; E2F3, E2F transcription factor 3; EMT, epithelial to mesenchymal transition; FGFR3, fibroblast growth factor receptor 3; FOX, forkhead box; GATA, GATA-binding protein; KRT, keratin; miR-200, microRNA 200; msi1, Musashi homolog 1; PD-1, programmed death-1; PD-L1, programmed death-ligand 1; PLEKHG4B, pleckstrin homology and RhoGEF domain containing G4B; SHH, sonic hedgehog; SNX31, sorting nexin 31; SOX, SRY-box.
The clinical impact of NMIBC is just as significant as that of MIBC, though maybe not as immediate a threat to survival, especially when taking into account rates of progression reaching as high as 50–60%. A considerable amount of information is available on molecular subtyping for NMIBC that is helping researchers hone in on the most important mutations in the evolution of bladder cancer59,70,71. Low-grade bladder tumors would appear to be genetically distinct from high-grade and MIBC, demonstrating highly conserved genetic mutations of FGFR3, PIK3CA, STAG2, and/or the RTK/RAS/RAF pathway72–75. High-grade NMIBC, on the other hand, is more like muscle-invasive disease, exhibiting alteration of DNA damage repair genes (ERBB2), cell cycle regulators (p53, RB1, MDM2, and CDKN2A), and chromatin-modifying genes (KDM6A and ARID1A)75. Molecular subtyping based on transcriptome analysis of 460 NMIBC and 16 MIBC samples by Hedegaard et al. identified three predominant classes of NMIBC, of which class two showed clustering of high-grade and CIS pathology with an increased risk of clinical progression, indicating that this may be a signature warranting more aggressive, definitive therapy upfront71. The TERT promoter is worth specific attention owing to similar frequency throughout all tumor stages and grades, regardless of tumor aggressiveness or molecular subtype, and likely represents an early event in the development of urothelial neoplasms76–78.
Personalized approach to bladder cancer therapy
Intravesical therapies
Instillation of chemotherapy immediately (within 24 hours) following TUR has been proposed as a method of reducing bladder cancer recurrences, specifically for low- and intermediate-risk disease, and is recommended by both the AUA and the EAU guidelines for NMIBC10,11. It is hypothesized to work via two main methods: (1) residual tumor that has not been fully resected will be killed and (2) elimination of free-floating cancerous cells dislodged during resection that may adhere to the urothelium and proliferate in a region separate from the primary79,80. The most well-studied agents include mitomycin C, doxorubicin, and epirubicin, all of which have been found to reduce recurrences (HR 0.40–0.65) without impacting progression or survival outcomes81–89. This is probably because of the preponderance of low-risk tumors included in the study cohorts, which are already at very low risk of progression to begin with. According to a recent, large meta-analysis, immediate post-resection instillation would appear to be most effective for small (<3 cm), low-grade, papillary tumors with a baseline recurrence rate of >1 year89. Not all urologists support this mode of treatment owing to the small but catastrophic possibility of chemotherapy leaking into the perivesical space via missed bladder perforation, in some cases resulting in end-stage bladder fibrosis, for the minimal clinical benefit of prolonging time between recurrences of relatively indolent tumors90,91. Though the overwhelming majority of available literature may offer support for this viewpoint, Bosscheiter et al. published a prospective, randomized trial of immediate post-operative mitomycin C versus instillation 2 weeks later among more than 2,000 patients across all risk categories, finding an overall reduction in 3-year recurrence (27% versus 36%) and progression (2.7% versus 5.5%)92. Interestingly, on subgroup analysis, only the intermediate- and high-risk patients—who also received an adjuvant 6- to 12-week course of intravesical mitomycin C—were found to benefit from the immediate post-operative dose.
Induction intravesical therapy refers to a period of weekly instillations of chemotherapy (i.e. mitomycin C, epirubicin, gemcitabine, etc.) or immunotherapy (i.e. BCG) following a complete TUR for NMIBC. At this point, TUR followed by a 6-week course of BCG plus 1 to 3 years of appropriate (3-weekly instillations based on SWOG protocol) maintenance therapy is the first-line option for high-risk disease with a proven improvement in disease recurrence and progression10,11,93–96. Intermediate-risk bladder cancer, on the other hand, can be successfully treated with either chemotherapy or immunotherapy; however, BCG must be followed by at least 1 year of maintenance in order to maintain an advantage in recurrence over mitomycin C94,97. Furthermore, while only BCG has shown improvement in progression for these patients, the potential side effects should be considered when selecting a treatment strategy97–99.
Patients who fail an adequate induction course of intravesical therapy, particularly those receiving BCG who are at highest risk for disease progression, pose a therapeutic dilemma: remove the bladder immediately to prevent muscle invasion and possible metastasis or continue local treatment with further instillations. It is preferable to avoid the morbidity and impact on quality of life associated with radical cystectomy; however, there are currently few alternatives in this setting. The lack of a standardized definition of BCG failure, recognizing that not all forms share the same prognosis, has hindered research into this area. To address these shortcomings, an international panel published guidance for clinicians and researchers to aid in creating more uniformity when designing trials and reporting on this group of patients, as well as to differentiate those with poorest prognosis (BCG unresponsive) who may not benefit from further BCG therapy (Table 2)100. The AUA recommends enrolment in clinical trials for patients who have demonstrated BCG unresponsiveness but are unwilling or unable to undergo a radical cystectomy11. Several such trials have offered promising results, with most reporting short-term reduction in recurrence of approximately 30–50%, but longer follow-up is associated with sharp declines in responsiveness, and, therefore, there is insufficient evidence to support any single approach, and radical cystectomy remains the gold standard in this population94,101–107.
Table 2. A classification system for bacillus Calmette-Guérin (BCG) failures100.
Type of failure
Description
BCG refractory
Persistence of high-grade disease at 6 months (3 months for T1 high grade) following adequate BCG treatment
BCG relapsing
Recurrence of high-grade disease following adequate BCG treatment with a disease-free period of 6 months
BCG unresponsive
Includes BCG refractory and BCG relapses within 6 months (12 months for carcinoma in situ patients)
BCG intolerant
Persistence of high-grade disease in a patient who is unable to tolerate induction BCG secondary to toxicity
Early cystectomy for non-muscle-invasive bladder cancer
Immediate radical cystectomy may be the best treatment option for selected patients with certain adverse “very high-risk” factors found at the time of diagnosis of NMIBC (Figure 3). High-volume T1, persistent high-grade T1 on re-TUR, lymphovascular invasion, certain variant histologies (i.e. micropapillary, plasmacytoid, nested), or concomitant CIS have all been associated with increased risk of progression and are best managed with surgery108–113. A group from the United Kingdom has designed a prospective, randomized controlled trial, with end of accrual set for March 2018, comparing immediate cystectomy against BCG induction with maintenance therapy for a “very high-risk” population of NMIBC patients114. Notably excluded from their cohort are any patients with variant histology.
Figure 3. Proposed decision model for immediate radical cystectomy in patients with “very high-risk” non-muscle-invasive bladder cancer (NMIBC)11,125–129.
AUA, American Urological Association; BCG, bacillus Calmette-Guérin; CIS, carcinoma in situ; LVI, lymphovascular invasion; TURBT, transurethral resection of bladder tumor.
Radiotherapy
Trimodal bladder-preserving therapy involves complete endoscopic resection of all visible tumor followed by neoadjuvant chemotherapy and definitive whole-bladder external beam radiotherapy. The use of this strategy is not widespread in the United States, but prospective European cohorts have demonstrated comparable disease-specific outcomes when compared to contemporary radical cystectomy cohorts115. Limited evidence regarding optimal patient selection has identified increased expression of MRE11, a protein involved in the cellular response to radiation damage, as a potential prognostic marker for improved cancer-specific survival following radiotherapy116,117.
Timing of chemotherapy for muscle-invasive bladder cancer
Muscle invasion at diagnosis of bladder cancer is a poor prognostic indicator best treated with neoadjuvant cisplatinum-based multi-agent chemotherapy followed by radical cystectomy according to evidence from several phase III clinical trials118–121. Disease status on final pathology is strongly correlated with oncologic outcomes, and neoadjuvant therapy leads to significant downstaging, including rates of complete response in the range of 30–40% compared to only 15% with surgery alone119. However, this still leaves a large portion of patients who will not derive benefit, instead undergoing unnecessary toxic therapy while at the same time delaying surgery. Risk stratification can be useful in this setting by selecting those patients with the highest risk (pre-operative T3b–T4, hydroureteronephrosis, lymphovascular invasion, and specific histologic variants) for poor outcomes after cystectomy and only administering neoadjuvant chemotherapy to this subgroup (Figure 4)122,123. Likewise, post-operative chemotherapy (i.e. adjuvant) can be administered in patients with proven pathologic predictors of developing metastasis, though evidence to support its use is lacking. One study (EORTC 30994) was able to show an improvement in progression-free survival; however, there was no statistically significant impact on overall survival124.
Figure 4. Current MD Anderson Cancer Center algorithm for determining which patients should receive neoadjuvant chemotherapy versus immediate radical cystectomy.
Inclusion of molecular markers for further risk stratification is pending clinical validation37. MIBC, muscle-invasive bladder cancer.
Conclusions
The appropriate management of bladder cancer patients relies heavily upon risk stratification to personalize the therapy for the patient. Currently, clinicopathologic features are the cornerstone of the most widely used risk assessment tools with ample room for improvement. Advances in genetic sequencing of tumors has led to classification systems based on the mutational profile of each individual, offering prognostic information. As these data expand, it is feasible that in the near future this could be integrated to provide guidance that is truly “next generation”.
Abbreviations
AUA, American Urological Association; BCG, bacillus Calmette-Guérin; CIS, carcinoma in situ; CUETO, Spanish Urological Club for Oncological Treatment; EAU, European Association of Urology; EORTC, European Organization for Research and Treatment of Cancer; MIBC, muscle-invasive bladder cancer; NMIBC, non-muscle-invasive bladder cancer; SWOG, Southwest Oncology Group; TCGA, the Cancer Genome Atlas; TUR, transurethral resection
Competing interests
AMK is a consultant to TMC Innovation, Merck, BMS, Arquer, MDxHealth, Photocure, Theralase, Cepheid, Medac, Asieris, Pfizer, and Astra Zeneca and has received research funding from FKD, Merck, Telesta, and Adolo. JTM has no competing interests to declare.
Grant information
AMK is supported by the Wayne B. Duddlesten Professorship and a Floyd Family Foundation Grant.
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Faculty Opinions recommended
References
1.
Burger M, Catto JW, Dalbagni G, et al.:
Epidemiology and risk factors of urothelial bladder cancer.
Eur Urol.
2013; 63(2): 234–41. PubMed Abstract
| Publisher Full Text
3.
Torre LA, Bray F, Siegel RL, et al.:
Global cancer statistics, 2012.
CA Cancer J Clin.
2015; 65(2): 87–108. PubMed Abstract
| Publisher Full Text
4.
American Joint Committee on Cancer: AJCC cancer staging manual. Eighth edition. Amin MB, Edge SB, ed. Switzerland: Springer; 2017. Reference Source
5.
Humphrey PA, Moch H, Cubilla AL, et al.:
The 2016 WHO Classification of Tumours of the Urinary System and Male Genital Organs-Part B: Prostate and Bladder Tumours.
Eur Urol.
2016; 70(1): 106–19. PubMed Abstract
| Publisher Full Text
6.
Divrik RT, Yildirim U, Zorlu F, et al.:
The effect of repeat transurethral resection on recurrence and progression rates in patients with T1 tumors of the bladder who received intravesical mitomycin: a prospective, randomized clinical trial.
J Urol.
2006; 175(5): 1641–4. PubMed Abstract
| Publisher Full Text
8.
Lazica DA, Roth S, Brandt AS, et al.:
Second transurethral resection after Ta high-grade bladder tumor: a 4.5-year period at a single university center.
Urol Int.
2014; 92(2): 131–5. PubMed Abstract
| Publisher Full Text
9.
Cumberbatch MGK, Foerster B, Catto JWF, et al.:
Repeat Transurethral Resection in Non-muscle-invasive Bladder Cancer: A Systematic Review.
Eur Urol.
2018; 73(6): 925–33. PubMed Abstract
| Publisher Full Text
10.
Babjuk M, Böhle A, Burger M, et al.:
EAU Guidelines on Non-Muscle-invasive Urothelial Carcinoma of the Bladder: Update 2016.
Eur Urol.
2017; 71(3): 447–61. PubMed Abstract
| Publisher Full Text
11.
Chang SS, Boorjian SA, Chou R, et al.:
Diagnosis and Treatment of Non-Muscle Invasive Bladder Cancer: AUA/SUO Guideline.
J Urol.
2016; 196(4): 1021–9. PubMed Abstract
| Publisher Full Text
12.
Burger M, Grossman HB, Droller M, et al.:
Photodynamic diagnosis of non-muscle-invasive bladder cancer with hexaminolevulinate cystoscopy: a meta-analysis of detection and recurrence based on raw data.
Eur Urol.
2013; 64(5): 846–54. PubMed Abstract
| Publisher Full Text
14.
Denzinger S, Burger M, Walter B, et al.:
Clinically relevant reduction in risk of recurrence of superficial bladder cancer using 5-aminolevulinic acid-induced fluorescence diagnosis: 8-year results of prospective randomized study.
Urology.
2007; 69(4): 675–9. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
17.
Lee JY, Cho KS, Kang DH, et al.:
A network meta-analysis of therapeutic outcomes after new image technology-assisted transurethral resection for non-muscle invasive bladder cancer: 5-aminolaevulinic acid fluorescence vs hexylaminolevulinate fluorescence vs narrow band imaging.
BMC Cancer.
2015; 15: 566. PubMed Abstract
| Publisher Full Text
| Free Full Text
18.
Rink M, Babjuk M, Catto JW, et al.:
Hexyl aminolevulinate-guided fluorescence cystoscopy in the diagnosis and follow-up of patients with non-muscle-invasive bladder cancer: a critical review of the current literature.
Eur Urol.
2013; 64(4): 624–38. PubMed Abstract
| Publisher Full Text
19.
Rolevich AI, Zhegalik AG, Mokhort AA, et al.:
Results of a prospective randomized study assessing the efficacy of fluorescent cystoscopy-assisted transurethral resection and single instillation of doxorubicin in patients with non-muscle-invasive bladder cancer.
World J Urol.
2017; 35(5): 745–52. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
20.
Chlapoutakis K, Theocharopoulos N, Yarmenitis S, et al.:
Performance of computed tomographic urography in diagnosis of upper urinary tract urothelial carcinoma, in patients presenting with hematuria: Systematic review and meta-analysis.
Eur J Radiol.
2010; 73(2): 334–8. PubMed Abstract
| Publisher Full Text
21.
Cowan NC, Turney BW, Taylor NJ, et al.:
Multidetector computed tomography urography for diagnosing upper urinary tract urothelial tumour.
BJU Int.
2007; 99(6): 1363–70. PubMed Abstract
| Publisher Full Text
22.
Froemming A, Potretzke T, Takahashi N, et al.:
Upper tract urothelial cancer.
Eur J Radiol.
2018; 98: 50–60. PubMed Abstract
| Publisher Full Text
24.
Takahashi N, Glockner JF, Hartman RP, et al.:
Gadolinium enhanced magnetic resonance urography for upper urinary tract malignancy.
J Urol.
2010; 183(4): 1330–65. PubMed Abstract
| Publisher Full Text
25.
Palou J, Rodríguez-Rubio F, Huguet J, et al.:
Multivariate analysis of clinical parameters of synchronous primary superficial bladder cancer and upper urinary tract tumor.
J Urol.
2005; 174(3): 859–61; discussion 861. PubMed Abstract
| Publisher Full Text
26.
Millán-Rodríguez F, Chéchile-Toniolo G, Salvador-Bayarri J, et al.:
Upper urinary tract tumors after primary superficial bladder tumors: prognostic factors and risk groups.
J Urol.
2000; 164(4): 1183–7. PubMed Abstract
| Publisher Full Text
27.
Fernandez-Gomez J, Madero R, Solsona E, et al.:
Predicting nonmuscle invasive bladder cancer recurrence and progression in patients treated with bacillus Calmette-Guerin: the CUETO scoring model.
J Urol.
2009; 182(5): 2195–203. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
28.
Sylvester RJ, van der Meijden AP, Oosterlinck W, et al.:
Predicting recurrence and progression in individual patients with stage Ta T1 bladder cancer using EORTC risk tables: a combined analysis of 2596 patients from seven EORTC trials.
Eur Urol.
2006; 49(3): 466–5; discussion 475–7. PubMed Abstract
| Publisher Full Text
29.
Fernandez-Gomez J, Madero R, Solsona E, et al.:
The EORTC tables overestimate the risk of recurrence and progression in patients with non-muscle-invasive bladder cancer treated with bacillus Calmette-Guérin: external validation of the EORTC risk tables.
Eur Urol.
2011; 60(3): 423–30. PubMed Abstract
| Publisher Full Text
30.
Hernández V, De La Peña E, Martin MD, et al.:
External validation and applicability of the EORTC risk tables for non-muscle-invasive bladder cancer.
World J Urol.
2011; 29(4): 409–14. PubMed Abstract
| Publisher Full Text
31.
Seo KW, Kim BH, Park CH, et al.:
The efficacy of the EORTC scoring system and risk tables for the prediction of recurrence and progression of non-muscle-invasive bladder cancer after intravesical bacillus calmette-guerin instillation.
Korean J Urol.
2010; 51(3): 165–70. PubMed Abstract
| Publisher Full Text
| Free Full Text
32.
Xylinas E, Kent M, Kluth L, et al.:
Accuracy of the EORTC risk tables and of the CUETO scoring model to predict outcomes in non-muscle-invasive urothelial carcinoma of the bladder.
Br J Cancer.
2013; 109(6): 1460–6. PubMed Abstract
| Publisher Full Text
| Free Full Text
33.
Lamm DL, Blumenstein BA, Crissman JD, et al.:
Maintenance bacillus Calmette-Guerin immunotherapy for recurrent TA, T1 and carcinoma in situ transitional cell carcinoma of the bladder: a randomized Southwest Oncology Group Study.
J Urol.
2000; 163(4): 1124–9. PubMed Abstract
| Publisher Full Text
34.
van Kessel KEM, van der Keur KA, Dyrskjøt L, et al.:
Molecular Markers Increase Precision of the European Association of Urology Non-Muscle-Invasive Bladder Cancer Progression Risk Groups.
Clin Cancer Res.
2018; 24(7): 1586–93. PubMed Abstract
| Publisher Full Text
35.
Kamat AM, Witjes JA, Brausi M, et al.:
Defining and treating the spectrum of intermediate risk nonmuscle invasive bladder cancer.
J Urol.
2014; 192(2): 305–15. PubMed Abstract
| Publisher Full Text
| Free Full Text
36.
Chang SS, Bochner BH, Chou R, et al.:
Treatment of Non-Metastatic Muscle-Invasive Bladder Cancer: AUA/ASCO/ASTRO/SUO Guideline.
J Urol.
2017; 198(3): 552–9. PubMed Abstract
| Publisher Full Text
| Free Full Text
38.
Hansel DE, Amin MB, Comperat E, et al.:
A contemporary update on pathology standards for bladder cancer: transurethral resection and radical cystectomy specimens.
Eur Urol.
2013; 63(2): 321–32. PubMed Abstract
| Publisher Full Text
39.
Kaimakliotis HZ, Monn MF, Cary KC, et al.:
Plasmacytoid variant urothelial bladder cancer: is it time to update the treatment paradigm?
Urol Oncol.
2014; 32(6): 833–8. PubMed Abstract
| Publisher Full Text
40.
Keck B, Stoehr R, Wach S, et al.:
The plasmacytoid carcinoma of the bladder--rare variant of aggressive urothelial carcinoma.
Int J Cancer.
2011; 129(2): 346–54. PubMed Abstract
| Publisher Full Text
41.
Keck B, Wach S, Stoehr R, et al.:
Plasmacytoid variant of bladder cancer defines patients with poor prognosis if treated with cystectomy and adjuvant cisplatin-based chemotherapy.
BMC Cancer.
2013; 13: 71. PubMed Abstract
| Publisher Full Text
| Free Full Text
42.
Fernández MI, Williams SB, Willis DL, et al.:
Clinical risk stratification in patients with surgically resectable micropapillary bladder cancer.
BJU Int.
2017; 119(5): 684–91. PubMed Abstract
| Publisher Full Text
43.
Kamat AM, Dinney CP, Gee JR, et al.:
Micropapillary bladder cancer: a review of the University of Texas M. D. Anderson Cancer Center experience with 100 consecutive patients.
Cancer.
2007; 110(1): 62–7. PubMed Abstract
| Publisher Full Text
44.
Meeks JJ, Taylor JM, Matsushita K, et al.:
Pathological response to neoadjuvant chemotherapy for muscle-invasive micropapillary bladder cancer.
BJU Int.
2013; 111(8): E325–30. PubMed Abstract
| Publisher Full Text
45.
Sui W, Matulay JT, James MB, et al.:
Micropapillary Bladder Cancer: Insights from the National Cancer Database.
Bladder Cancer.
2016; 2(4): 415–23. PubMed Abstract
| Publisher Full Text
| Free Full Text
47.
Amin MB:
Histological variants of urothelial carcinoma: diagnostic, therapeutic and prognostic implications.
Mod Pathol.
2009; 22 Suppl 2: S96–S118. PubMed Abstract
| Publisher Full Text
48.
Mitra AP, Bartsch CC, Bartsch G Jr, et al.:
Does presence of squamous and glandular differentiation in urothelial carcinoma of the bladder at cystectomy portend poor prognosis? An intensive case-control analysis.
Urol Oncol.
2014; 32(2): 117–27. PubMed Abstract
| Publisher Full Text
49.
Abdollah F, Sun M, Jeldres C, et al.:
Survival after radical cystectomy of non-bilharzial squamous cell carcinoma vs urothelial carcinoma: a competing-risks analysis.
BJU Int.
2012; 109(4): 564–9. PubMed Abstract
| Publisher Full Text
50.
Zaghloul MS, Nouh A, Nazmy M, et al.:
Long-term results of primary adenocarcinoma of the urinary bladder: a report on 192 patients.
Urol Oncol.
2006; 24(1): 13–20. PubMed Abstract
| Publisher Full Text
52.
Lynch SP, Shen Y, Kamat A, et al.:
Neoadjuvant chemotherapy in small cell urothelial cancer improves pathologic downstaging and long-term outcomes: results from a retrospective study at the MD Anderson Cancer Center.
Eur Urol.
2013; 64(2): 307–13. PubMed Abstract
| Publisher Full Text
| Free Full Text
54.
Yap KL, Kiyotani K, Tamura K, et al.:
Whole-exome sequencing of muscle-invasive bladder cancer identifies recurrent mutations of UNC5C and prognostic importance of DNA repair gene mutations on survival.
Clin Cancer Res.
2014; 20(24): 6605–17. PubMed Abstract
| Publisher Full Text
| Free Full Text
57.
Choi W, Porten S, Kim S, et al.:
Identification of distinct basal and luminal subtypes of muscle-invasive bladder cancer with different sensitivities to frontline chemotherapy.
Cancer Cell.
2014; 25(2): 152–65. PubMed Abstract
| Publisher Full Text
| Free Full Text
58.
Damrauer JS, Hoadley KA, Chism DD, et al.:
Intrinsic subtypes of high-grade bladder cancer reflect the hallmarks of breast cancer biology.
Proc Natl Acad Sci U S A.
2014; 111(8): 3110–5. PubMed Abstract
| Publisher Full Text
| Free Full Text
59.
Lindgren D, Frigyesi A, Gudjonsson S, et al.:
Combined gene expression and genomic profiling define two intrinsic molecular subtypes of urothelial carcinoma and gene signatures for molecular grading and outcome.
Cancer Res.
2010; 70(9): 3463–72. PubMed Abstract
| Publisher Full Text
61.
Lerner SP, McConkey DJ, Hoadley KA, et al.:
Bladder Cancer Molecular Taxonomy: Summary from a Consensus Meeting.
Bladder Cancer.
2016; 2(1): 37–47. PubMed Abstract
| Publisher Full Text
| Free Full Text
62.
Rebouissou S, Bernard-Pierrot I, de Reyniès A, et al.:
EGFR as a potential therapeutic target for a subset of muscle-invasive bladder cancers presenting a basal-like phenotype.
Sci Transl Med.
2014; 6(244): 244ra91. PubMed Abstract
| Publisher Full Text
64.
Seiler R, Ashab HAD, Erho N, et al.:
Impact of Molecular Subtypes in Muscle-invasive Bladder Cancer on Predicting Response and Survival after Neoadjuvant Chemotherapy.
Eur Urol.
2017; 72(4): 544–54. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
65.
Groenendijk FH, de Jong J, Fransen van de Putte EE, et al.:
ERBB2 Mutations Characterize a Subgroup of Muscle-invasive Bladder Cancers with Excellent Response to Neoadjuvant Chemotherapy.
Eur Urol.
2016; 69(3): 384–8. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
70.
Hurst CD, Alder O, Platt FM, et al.:
Genomic Subtypes of Non-invasive Bladder Cancer with Distinct Metabolic Profile and Female Gender Bias in KDM6A Mutation Frequency.
Cancer Cell.
2017; 32(5): 701–715.e7. PubMed Abstract
| Publisher Full Text
| Free Full Text
72.
Al Hussain TO, Akhtar M:
Molecular basis of urinary bladder cancer.
Adv Anat Pathol.
2013; 20(1): 53–60. PubMed Abstract
| Publisher Full Text
73.
Billerey C, Chopin D, Aubriot-Lorton MH, et al.:
Frequent FGFR3 mutations in papillary non-invasive bladder (pTa) tumors.
Am J Pathol.
2001; 158(6): 1955–9. PubMed Abstract
| Publisher Full Text
| Free Full Text
74.
Liu X, Zhang W, Geng D, et al.:
Clinical significance of fibroblast growth factor receptor-3 mutations in bladder cancer: a systematic review and meta-analysis.
Genet Mol Res.
2014; 13(1): 1109–20. PubMed Abstract
| Publisher Full Text
76.
Allory Y, Beukers W, Sagrera A, et al.:
Telomerase reverse transcriptase promoter mutations in bladder cancer: high frequency across stages, detection in urine, and lack of association with outcome.
Eur Urol.
2014; 65(2): 360–6. PubMed Abstract
| Publisher Full Text
77.
Cheng L, Davidson DD, Wang M, et al.:
Telomerase reverse transcriptase (TERT) promoter mutation analysis of benign, malignant and reactive urothelial lesions reveals a subpopulation of inverted papilloma with immortalizing genetic change.
Histopathology.
2016; 69(1): 107–13. PubMed Abstract
| Publisher Full Text
79.
Kaasinen E, Rintala E, Hellström P, et al.:
Factors explaining recurrence in patients undergoing chemoimmunotherapy regimens for frequently recurring superficial bladder carcinoma.
Eur Urol.
2002; 42(2): 167–74. PubMed Abstract
| Publisher Full Text
80.
Pode D, Alon Y, Horowitz AT, et al.:
The mechanism of human bladder tumor implantation in an in vitro model.
J Urol.
1986; 136(2): 482–6. PubMed Abstract
| Publisher Full Text
81.
Barghi MR, Rahmani MR, Hosseini Moghaddam SM, et al.:
Immediate intravesical instillation of mitomycin C after transurethral resection of bladder tumor in patients with low-risk superficial transitional cell carcinoma of bladder.
Urol J.
2006; 3(4): 220–4. PubMed Abstract
| Publisher Full Text
82.
Berrum-Svennung I, Granfors T, Jahnson S, et al.:
A single instillation of epirubicin after transurethral resection of bladder tumors prevents only small recurrences.
J Urol.
2008; 179(1): 101–5; discussion 105–6. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
83.
De Nunzio C, Carbone A, Albisinni S, et al.:
Long-term experience with early single mitomycin C instillations in patients with low-risk non-muscle-invasive bladder cancer: prospective, single-centre randomised trial.
World J Urol.
2011; 29(4): 517–21. PubMed Abstract
| Publisher Full Text
84.
Gudjónsson S, Adell L, Merdasa F, et al.:
Should all patients with non-muscle-invasive bladder cancer receive early intravesical chemotherapy after transurethral resection? The results of a prospective randomised multicentre study.
Eur Urol.
2009; 55(4): 773–80. PubMed Abstract
| Publisher Full Text
85.
Kang M, Jeong CW, Kwak C, et al.:
Single, immediate postoperative instillation of chemotherapy in non-muscle invasive bladder cancer: a systematic review and network meta-analysis of randomized clinical trials using different drugs.
Oncotarget.
2016; 7(29): 45479–88. PubMed Abstract
| Publisher Full Text
| Free Full Text
86.
Perlis N, Zlotta AR, Beyene J, et al.:
Immediate post-transurethral resection of bladder tumor intravesical chemotherapy prevents non-muscle-invasive bladder cancer recurrences: an updated meta-analysis on 2548 patients and quality-of-evidence review.
Eur Urol.
2013; 64(3): 421–30. PubMed Abstract
| Publisher Full Text
87.
Solsona E, Iborra I, Ricós JV, et al.:
Effectiveness of a single immediate mitomycin C instillation in patients with low risk superficial bladder cancer: short and long-term followup.
J Urol.
1999; 161(4): 1120–3. PubMed Abstract
| Publisher Full Text
88.
Sylvester RJ, Oosterlinck W:
An immediate instillation after transurethral resection of bladder tumor in non-muscle-invasive bladder cancer: has the evidence changed?
Eur Urol.
2009; 56(1): 43–5. PubMed Abstract
| Publisher Full Text
89.
Sylvester RJ, Oosterlinck W, Holmang S, et al.:
Systematic Review and Individual Patient Data Meta-analysis of Randomized Trials Comparing a Single Immediate Instillation of Chemotherapy After Transurethral Resection with Transurethral Resection Alone in Patients with Stage pTa-pT1 Urothelial Carcinoma of the Bladder: Which Patients Benefit from the Instillation?
Eur Urol.
2016; 69(2): 231–44. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
90.
Elmamoun MH, Christmas TJ, Woodhouse CR:
Destruction of the bladder by single dose Mitomycin C for low-stage transitional cell carcinoma (TCC)--avoidance, recognition, management and consent.
BJU Int.
2014; 113(5b): E34–8. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
91.
Oddens JR, van der Meijden AP, Sylvester R:
One immediate postoperative instillation of chemotherapy in low risk Ta, T1 bladder cancer patients. Is it always safe?
Eur Urol.
2004; 46(3): 336–8. PubMed Abstract
| Publisher Full Text
92.
Bosschieter J, Nieuwenhuijzen JA, van Ginkel T, et al.:
Value of an Immediate Intravesical Instillation of Mitomycin C in Patients with Non-muscle-invasive Bladder Cancer: A Prospective Multicentre Randomised Study in 2243 patients.
Eur Urol.
2018; 73(2): 226–32. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
93.
Böhle A, Jocham D, Bock PR:
Intravesical bacillus Calmette-Guerin versus mitomycin C for superficial bladder cancer: a formal meta-analysis of comparative studies on recurrence and toxicity.
J Urol.
2003; 169(1): 90–5. PubMed Abstract
| Publisher Full Text
94.
Malmström PU, Sylvester RJ, Crawford DE, et al.:
An individual patient data meta-analysis of the long-term outcome of randomised studies comparing intravesical mitomycin C versus bacillus Calmette-Guérin for non-muscle-invasive bladder cancer.
Eur Urol.
2009; 56(2): 247–56. PubMed Abstract
| Publisher Full Text
95.
Shelley MD, Mason MD, Kynaston H:
Intravesical therapy for superficial bladder cancer: a systematic review of randomised trials and meta-analyses.
Cancer Treat Rev.
2010; 36(3): 195–205. PubMed Abstract
| Publisher Full Text
96.
Shelley MD, Wilt TJ, Court J, et al.:
Intravesical bacillus Calmette-Guérin is superior to mitomycin C in reducing tumour recurrence in high-risk superficial bladder cancer: a meta-analysis of randomized trials.
BJU Int.
2004; 93(4): 485–90. PubMed Abstract
| Publisher Full Text
97.
Chou R, Selph S, Buckley DI, et al.:
Intravesical Therapy for the Treatment of Nonmuscle Invasive Bladder Cancer: A Systematic Review and Meta-Analysis.
J Urol.
2017; 197(5): 1189–99. PubMed Abstract
| Publisher Full Text
98.
Brausi M, Oddens J, Sylvester R, et al.:
Side effects of Bacillus Calmette-Guérin (BCG) in the treatment of intermediate- and high-risk Ta, T1 papillary carcinoma of the bladder: results of the EORTC genito-urinary cancers group randomised phase 3 study comparing one-third dose with full dose and 1 year with 3 years of maintenance BCG.
Eur Urol.
2014; 65(1): 69–76. PubMed Abstract
| Publisher Full Text
99.
Böhle A, Bock PR:
Intravesical bacille Calmette-Guérin versus mitomycin C in superficial bladder cancer: formal meta-analysis of comparative studies on tumor progression.
Urology.
2004; 63(4): 682–6; discussion 686–7. PubMed Abstract
| Publisher Full Text
100.
Kamat AM, Sylvester RJ, Böhle A, et al.:
Definitions, End Points, and Clinical Trial Designs for Non-Muscle-Invasive Bladder Cancer: Recommendations From the International Bladder Cancer Group.
J Clin Oncol.
2016; 34(16): 1935–44. PubMed Abstract
| Publisher Full Text
| Free Full Text
101.
Barlow LJ, Benson MC:
Experience with newer intravesical chemotherapy for high-risk non-muscle-invasive bladder cancer.
Curr Urol Rep.
2013; 14(2): 65–70. PubMed Abstract
| Publisher Full Text
102.
Di Lorenzo G, Perdonà S, Damiano R, et al.:
Gemcitabine versus bacille Calmette-Guérin after initial bacille Calmette-Guérin failure in non-muscle-invasive bladder cancer: a multicenter prospective randomized trial.
Cancer.
2010; 116(8): 1893–900. PubMed Abstract
| Publisher Full Text
103.
McKiernan JM, Holder DD, Ghandour RA, et al.:
Phase II trial of intravesical nanoparticle albumin bound paclitaxel for the treatment of nonmuscle invasive urothelial carcinoma of the bladder after bacillus Calmette-Guérin treatment failure.
J Urol.
2014; 192(6): 1633–8. PubMed Abstract
| Publisher Full Text
105.
Shelley MD, Jones G, Cleves A, et al.:
Intravesical gemcitabine therapy for non-muscle invasive bladder cancer (NMIBC): a systematic review.
BJU Int.
2012; 109(4): 496–505. PubMed Abstract
| Publisher Full Text
106.
Steinberg G, Bahnson R, Brosman S, et al.:
Efficacy and safety of valrubicin for the treatment of Bacillus Calmette-Guerin refractory carcinoma in situ of the bladder. The Valrubicin Study Group.
J Urol.
2000; 163(3): 761–7. PubMed Abstract
| Publisher Full Text
107.
Sternberg IA, Dalbagni G, Chen LY, et al.:
Intravesical gemcitabine for high risk, nonmuscle invasive bladder cancer after bacillus Calmette-Guérin treatment failure.
J Urol.
2013; 190(5): 1686–91. PubMed Abstract
| Publisher Full Text
108.
Mathieu R, Lucca I, Rouprêt M, et al.:
The prognostic role of lymphovascular invasion in urothelial carcinoma of the bladder.
Nat Rev Urol.
2016; 13(8): 471–9. PubMed Abstract
| Publisher Full Text
109.
Martin-Doyle W, Leow JJ, Orsola A, et al.:
Improving selection criteria for early cystectomy in high-grade t1 bladder cancer: a meta-analysis of 15,215 patients.
J Clin Oncol.
2015; 33(6): 643–50. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
111.
Segal R, Yafi FA, Brimo F, et al.:
Prognostic factors and outcome in patients with T1 high-grade bladder cancer: can we identify patients for early cystectomy?
BJU Int.
2012; 109(7): 1026–30. PubMed Abstract
| Publisher Full Text
112.
Mally AD, Tin AL, Lee JK, et al.:
Clinical Outcomes of Patients With T1 Nested Variant of Urothelial Carcinoma Compared to Pure Urothelial Carcinoma of the Bladder.
Clin Genitourin Cancer.
2017; pii: S1558-7673(17)30199-4. PubMed Abstract
| Publisher Full Text
| Free Full Text
113.
Ark JT, Keegan KA, Barocas DA, et al.:
Incidence and predictors of understaging in patients with clinical T1 urothelial carcinoma undergoing radical cystectomy.
BJU Int.
2014; 113(6): 894–9. PubMed Abstract
| Publisher Full Text
| Free Full Text
114.
Oughton JB, Poad H, Twiddy M, et al.:
Radical cystectomy (bladder removal) against intravesical BCG immunotherapy for high-risk non-muscle invasive bladder cancer (BRAVO): a protocol for a randomised controlled feasibility study.
BMJ Open.
2017; 7(8): e017913. PubMed Abstract
| Free Full Text
115.
Mak RH, Hunt D, Shipley WU, et al.:
Long-term outcomes in patients with muscle-invasive bladder cancer after selective bladder-preserving combined-modality therapy: a pooled analysis of Radiation Therapy Oncology Group protocols 8802, 8903, 9506, 9706, 9906, and 0233.
J Clin Oncol.
2014; 32(34): 3801–9. PubMed Abstract
| Publisher Full Text
| Free Full Text
116.
Choudhury A, Nelson LD, Teo MT, et al.:
MRE11 expression is predictive of cause-specific survival following radical radiotherapy for muscle-invasive bladder cancer.
Cancer Res.
2010; 70(18): 7017–26. PubMed Abstract
| Publisher Full Text
| Free Full Text
117.
Laurberg JR, Brems-Eskildsen AS, Nordentoft I, et al.:
Expression of TIP60 (tat-interactive protein) and MRE11 (meiotic recombination 11 homolog) predict treatment-specific outcome of localised invasive bladder cancer.
BJU Int.
2012; 110(11 Pt C): E1228–36. PubMed Abstract
| Publisher Full Text
119.
Advanced Bladder Cancer (ABC) Meta-analysis Collaboration:
Neoadjuvant chemotherapy in invasive bladder cancer: update of a systematic review and meta-analysis of individual patient data advanced bladder cancer (ABC) meta-analysis collaboration.
Eur Urol.
2005; 48(2): 202–5; discussion 205–6. PubMed Abstract
| Publisher Full Text
120.
Yuh BE, Ruel N, Wilson TG, et al.:
Pooled analysis of clinical outcomes with neoadjuvant cisplatin and gemcitabine chemotherapy for muscle invasive bladder cancer.
J Urol.
2013; 189(5): 1682–6. PubMed Abstract
| Publisher Full Text
| Free Full Text
121.
International Collaboration of Trialists, Medical Research Council Advanced Bladder Cancer Working Party (now the National Cancer Research Institute Bladder Cancer Clinical Studies Group), European Organisation for Research and Treatment of Cancer Genito-Urinary Tract Cancer Group, et al. :
International phase III trial assessing neoadjuvant cisplatin, methotrexate, and vinblastine chemotherapy for muscle-invasive bladder cancer: long-term results of the BA06 30894 trial.
J Clin Oncol.
2011; 29(16): 2171–7. PubMed Abstract
| Publisher Full Text
| Free Full Text
| Faculty Opinions Recommendation
122.
Culp SH, Dickstein RJ, Grossman HB, et al.:
Refining patient selection for neoadjuvant chemotherapy before radical cystectomy.
J Urol.
2014; 191(1): 40–7. PubMed Abstract
| Publisher Full Text
| Free Full Text
123.
Moschini M, Soria F, Klatte T, et al.:
Validation of Preoperative Risk Grouping of the Selection of Patients Most Likely to Benefit From Neoadjuvant Chemotherapy Before Radical Cystectomy.
Clin Genitourin Cancer.
2017; 15(2): e267–e273. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
124.
Sternberg CN, Skoneczna I, Kerst JM, et al.:
Immediate versus deferred chemotherapy after radical cystectomy in patients with pT3-pT4 or N+ M0 urothelial carcinoma of the bladder (EORTC 30994): an intergroup, open-label, randomised phase 3 trial.
Lancet Oncol.
2015; 16(1): 76–86. PubMed Abstract
| Publisher Full Text
| Faculty Opinions Recommendation
125.
Dong F, Shen Y, Gao F, et al.:
Nomograms to Predict Individual Prognosis of Patients with Primary Small Cell Carcinoma of the Bladder.
J Cancer.
2018; 9(7): 1152–64. PubMed Abstract
| Publisher Full Text
| Free Full Text
126.
Kouba EJ, Cheng L:
Understanding the Genetic Landscape of Small Cell Carcinoma of the Urinary Bladder and Implications for Diagnosis, Prognosis, and Treatment: A Review.
JAMA Oncol.
2017; 3(11): 1570–8. PubMed Abstract
| Publisher Full Text
127.
Millis SZ, Bryant D, Basu G, et al.:
Molecular profiling of infiltrating urothelial carcinoma of bladder and nonbladder origin.
Clin Genitourin Cancer.
2015; 13(1): e37–49. PubMed Abstract
| Publisher Full Text
128.
Zheng X, Liu D, Fallon JT, et al.:
Distinct genetic alterations in small cell carcinoma from different anatomic sites.
Exp Hematol Oncol.
2015; 4: 2. PubMed Abstract
| Publisher Full Text
| Free Full Text
129.
Siefker-Radtke AO, Kamat AM, Grossman HB, et al.:
Phase II clinical trial of neoadjuvant alternating doublet chemotherapy with ifosfamide/doxorubicin and etoposide/cisplatin in small-cell urothelial cancer.
J Clin Oncol.
2009; 27(16): 2592–7. PubMed Abstract
| Publisher Full Text
| Free Full Text
AMK is a consultant to TMC Innovation, Merck, BMS, Arquer, MDxHealth, Photocure, Theralase, Cepheid, Medac, Asieris, Pfizer, and Astra Zeneca and has received research funding from FKD, Merck, Telesta, and Adolo. JTM has no competing interests to declare.
AMK is supported by the Wayne B. Duddlesten Professorship and a Floyd Family Foundation Grant.
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Matulay JT and Kamat AM. Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.12688/f1000research.14903.1)
NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article.
track
receive updates on this article
Track an article to receive email alerts on any updates to this article.
Share
Open Peer Review
Current Reviewer Status:
?
Key to Reviewer Statuses
VIEWHIDE
ApprovedThe paper is scientifically sound in its current form and only minor, if any, improvements are suggested
Approved with reservations
A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit.
Not approvedFundamental flaws in the paper seriously undermine the findings and conclusions
I confirm that I have read this submission and believe that I have an
... Continue reading
Competing Interests: No competing interests were disclosed.
Faculty Reviews are commissioned and written by members of the prestigious Faculty Opinions Faculty, and are edited as a service to our readers. In order to make these reviews as comprehensive and accessible as possible, we seek the reviewers’ input before publication. The reviewers’ names and any additional comments they may have are published alongside the review, as is usual on F1000Research.
I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.
Real FX. Reviewer Report For: Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.5256/f1000research.16224.r36208)
I confirm that I have read this submission and believe that I have an
... Continue reading
Competing Interests: No competing interests were disclosed.
Faculty Reviews are commissioned and written by members of the prestigious Faculty Opinions Faculty, and are edited as a service to our readers. In order to make these reviews as comprehensive and accessible as possible, we seek the reviewers’ input before publication. The reviewers’ names and any additional comments they may have are published alongside the review, as is usual on F1000Research.
I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.
Real FX. Reviewer Report For: Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.5256/f1000research.16224.r36208)
I confirm that I have read this submission and believe that I have an
... Continue reading
Competing Interests: No competing interests were disclosed.
Faculty Reviews are commissioned and written by members of the prestigious Faculty Opinions Faculty, and are edited as a service to our readers. In order to make these reviews as comprehensive and accessible as possible, we seek the reviewers’ input before publication. The reviewers’ names and any additional comments they may have are published alongside the review, as is usual on F1000Research.
I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.
Montironi R. Reviewer Report For: Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.5256/f1000research.16224.r36210)
NOTE: it is important to ensure the information in square brackets after the title is included in this citation.
Reviewer Report25 Jul 2018
Rodolfo Montironi,
School of Medicine, United Hospitals, Institute of Pathological Anatomy and Histopathology, Polytechnic University of the Marche Region (Ancona), Ancona, Italy
I confirm that I have read this submission and believe that I have an
... Continue reading
Competing Interests: No competing interests were disclosed.
Faculty Reviews are commissioned and written by members of the prestigious Faculty Opinions Faculty, and are edited as a service to our readers. In order to make these reviews as comprehensive and accessible as possible, we seek the reviewers’ input before publication. The reviewers’ names and any additional comments they may have are published alongside the review, as is usual on F1000Research.
I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.
Montironi R. Reviewer Report For: Advances in risk stratification of bladder cancer to guide personalized medicine [version 1; peer review: 4 approved]. F1000Research 2018, 7(F1000 Faculty Rev):1137 (https://doi.org/10.5256/f1000research.16224.r36210)
Alongside their report, reviewers assign a status to the article:
Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested
Approved with reservations -
A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit.
Not approved - fundamental flaws in the paper seriously undermine the findings and conclusions
Adjust parameters to alter display
View on desktop for interactive features
Includes Interactive Elements
View on desktop for interactive features
Competing Interests Policy
Provide sufficient details of any financial or non-financial competing interests to enable users to assess whether your comments might lead a reasonable person to question your impartiality. Consider the following examples, but note that this is not an exhaustive list:
Examples of 'Non-Financial Competing Interests'
Within the past 4 years, you have held joint grants, published or collaborated with any of the authors of the selected paper.
You have a close personal relationship (e.g. parent, spouse, sibling, or domestic partner) with any of the authors.
You are a close professional associate of any of the authors (e.g. scientific mentor, recent student).
You work at the same institute as any of the authors.
You hope/expect to benefit (e.g. favour or employment) as a result of your submission.
You are an Editor for the journal in which the article is published.
Examples of 'Financial Competing Interests'
You expect to receive, or in the past 4 years have received, any of the following from any commercial organisation that may gain financially from your submission: a salary, fees, funding, reimbursements.
You expect to receive, or in the past 4 years have received, shared grant support or other funding with any of the authors.
You hold, or are currently applying for, any patents or significant stocks/shares relating to the subject matter of the paper you are commenting on.
Stay Updated
Sign up for content alerts and receive a weekly or monthly email with all newly published articles
Comments on this article Comments (0)