Keywords
Priapism, Chronic myeloid leukemia, Distal shunting, Proximal shunting
Priapism, Chronic myeloid leukemia, Distal shunting, Proximal shunting
Priapism is a medical condition characterized by prolonged penile erection lasting more than four hours; hematological disorders are one of its major causes. Chronic myeloid leukemia (CML) is the most frequent hematological disorder that can lead to priapism, and it is often accompanied by other symptoms such as hyperleukocytosis, lymphadenopathy, asthenia, and enlargement of the spleen and liver.1,2 Prolonged priapism can lead to permanent erectile dysfunction, which is considered a urologic emergency.3
CML is a type of blood cancer caused by a chimeric oncogene, BCR-ABL, and can spread in both the myeloid and lymphoid lineages.4,5 It is estimated to include 1-2 cases per 100,000 people each year, with an average age of 45 to 55 years old and 20% of adult leukemia cases. Symptoms include fatigue, weight loss, abdominal discomfort, bleeding, purpura, enlarged spleen, excess of white blood cells, anemia, and elevated platelet count.6 Priapism is a medical emergency that occurs when a man has an erection that lasts too long, not related to sexual arousal, and may not be relieved by ejaculation. Untreated, low-flow priapism may lead to permanent impotence.7,8
A 21-year-old man came with a complaint of continuous penis erection for the past three days with an Erection Hardness Score (EHS) of 4. There was no fever or history of trauma, but the patient had been regularly consuming weight gain medication for the past two months. During the physical examination, the patient appeared to be weak and had an axilla temperature of 37°C. The eye examination revealed a pale conjunctiva as well as swelling and ulcers, and the examination of the genitalia showed a painful erection (Figure 1). The patient has agreed for the data and photos to be used in research and publication. The patient has signed a written informed consent.
Laboratory tests showed WBC = 551×103 /μL, Hb = 8.8 g/dL, hematocrit = 24%, MCV of 86 fL, MCH of 32 pg, MCHC of 30.80, and platelets count of 385×103/μL. A differential count results were 87/87/3/3/5 ×103/μL. PT=16.3s APTT = 30 s. A blood gas analysis showed pH: 6.34; pCO2: 71.3 mmHg; pO2: 11.43 mmHg; HCO3 - : 4.83; SO2c: 1.8%; TCO2: 6.90 mmol/L.
The peripheral blood test showed anisocytosis and mild poikilocytosis and granulocytic series with 5% blast rate (Figure 2). The patient was suspected to have Chronic Myelocytic Leukemia (CML) and priapism, based on clinical and supporting information. A doppler ultrasonography revealed hypoechoic areas in the right and left corpora carvernosa with low flow in the right and left carvenosa arteries (Figure 3).
The patient complained of pain and swelling, so it was decided to perform a Winter procedure in the operating room, with local anesthetic injected and a large core biopsy needle inserted through the glans and directed proximally to the corpus cavernosum (Figure 4).9
The glans penis became edematous and cyanotic after the Winter procedure and proximal shunting and debridement was performed, with a longitudinal shaft penis incision, dissection of the bulbocavernosus muscle, and parallel incisions in the corporal bodies (Figure 5).
Two days after proximal shunting, EHS dropped from 3 to 1, but edema persisted. Hydroxyurea therapy resulted in decreased leukocyte from 551,000 to 272,000. Reverse transcription multiplex PCR genetic testing revealed BCR-ABL (+) in the form of b2A2 and b3a2 fusion, encoding protein p210 or major breakpoint (Figure 6). Imatinib was given as CML therapy for the lifetime.
CML is a type of blood cancer that occurs due to a genetic mutation caused by the fusion of two normal chromosomes.2,10 It is common globally, with an average age of 40-60 years and a slightly higher occurrence in males (1.4:1).2,11 CML is classified as a type of myeloproliferative neoplasm. In CML, there is an excessive production of mature granulocytes. The disease progresses through three stages: the chronic phase, the accelerated phase, and the blast phase.12 Diagnosis is often delayed due to vague clinical symptoms. Leukocytosis affects all levels of differentiation and maturation of myeloid cells, resulting in the overproduction of mature granulocytes, eosinophils, and basophils. The presence of the Philadelphia chromosome, which is a translocation of chromosomes 9 and 22, is seen in about 95% of CML cases (Table 1).13
First author | Year of publication | |
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Ali1 | 2021 | The prompt administration of CML treatment may facilitate the prompt resolution of priapism and may be essential for achieving complete remission of the condition. |
Chowdhury26 | 2020 | Six patients with CML were treated with minimally invasive procedures and one required a proximal shunt, all referred to a hematologist for proper management. |
Jandial27 | 2019 | Treatment response was favorable, but long duration of symptoms and leukocytosis likely led to ischemic priapism and ED. |
Kumar and Garg28 | 2018 | On average, individuals who presented with ischemic priapism caused by CML were 27.50 years old, mean duration was 4.25 days, no oncological treatment, eight successful detumescence. |
Tendulkar29 | 2017 | Leukapheresis was successful in reducing white blood cell count and symptoms of leukostasis, with 1.6 sessions needed. |
Ekeke30 | 2015 | Priapism was diagnosed in two patients with CML, but treatment methods were not specified. |
Kurosawa31 | 2015 | Imatinib and hydroxycarbamide treatment may have resulted in erectile dysfunction in two CML patients. |
Pal32 | 2015 | Four CML patients experienced priapism after treatment with imatinib, hydroxycarbamide, leukapheresis, and aspiration or irrigation. It is possible that two CML patients developed erectile dysfunction after being treated. |
Nabi33 | 2000 | The seven patients had successful detumescence after treatment with Winter shunts, hydroxycarbamide, and allopurinol, but none had potency during follow-up. |
Rapid treatment is necessary for priapism, which is a medical emergency and occurs at a rate of 1.5 cases per 100,000 person per years.14 It is a rare presentation of CML, affecting males aged 5-10 and 20-50, with hematological conditions as the main cause.2
Priapism is classified into three types based on its cause and how it affects the body: ischemic, nonischemic, and stuttering. The defining features of ischemic priapism include rigidity of the corpora cavernosa and inadequate blood flow to the cavernous arteries, leading to stiffness and pain.13 It can cause erectile dysfunction in up to 90% of cases, making it a medical emergency that must be treated promptly.15 Nonischemic priapism can be caused by trauma or congenital malformations, iatrogenic causes, or shunt procedures.16 Unlike ischemic priapism, nonischemic priapism is not considered a medical emergency and typically does not require immediate intervention.15 Stuttering priapism can cause permanent damage to the corpus cavernosum and erectile dysfunction,17 so it is important to treat it immediately with medication that addresses the underlying cause.15,18
Theories on the origin of priapism are being revised, with the hypothesis that it may stem from dysregulation of nitric oxide (NO) in the blood vessels of the penis.19 Other possible causes include elevated adenosine levels and the influence of opiorphins.2 The sludging of blood within the corpora cavernosa is the underlying cause of ischemic priapism, which leads to tissue ischemia and a reduction in oxygen supply to the smooth muscles.19–21 Platelets begin to attach to the basement membrane of the sinusoidal endothelium after 12 hours, while cavernosal smooth muscle necrosis sets in after 48 hours.2 Blood exchange transfusions have been shown to be effective and safe in treating patients with sickle cell disease and severe priapism (Table 2).1
Author (s) | Age (years) and diagnosis | Duration of the complaint | White blood cells | Signs, symptoms, and treatment |
---|---|---|---|---|
103 cell/mm3 | ||||
Gaye, Thiam et al. 202034 | 46, Chronic myeloid leukemia | 48 hours | 526 | |
Dhar, Chhabra et al. 201935 | 52, Chronic myeloid leukemia | 4 hours | 239 | |
Qu, Lu et al. 201836 | 18, Chronic myeloid leukemia | 1 week | 257 | |
Becerra, Jimenez et al. 201837 | 52, Chronic myeloid leukemia | 6 days | 282 | |
Khan, Shafiq et al. 201838 | 16, Chronic myeloid leukemia | 11 days | 614 | |
Nerli, Magdum et al. 201639 | 19, Chronic myeloid leukemia | 24 hrs | 296 | |
Shaeer, Shaeer et al. 201540 | 21, Chronic myeloid leukemia | 6 days | 410 | |
Farhan, Anjum et al. 201541 | 38, Chronic myeloid leukemia | 30 hrs | 155 | |
Gupta, Seth, Gupta 200942 | 12, Chronic myeloid leukemia | 2 days | 346 | |
Jameel and Mehmood 200943 | 21, Chronic myeloid leukemia | 8 hrs | 316 | |
55, Chronic myeloid leukemia | 12 hrs | 282 | ||
Ponniah, Brown and Taylor 200444 | 19, Chronic myeloid leukemia | 18 hours | 513 | |
Chang et al. 200345 | 21, Chronic myeloid leukemia | not available | 217 |
Surgery is the first course of treatment to drain deoxygenated blood from the corpora cavernosa.
Guidelines recommend an aggressive approach for managing patients with refractory priapism. This typically involves a sequential approach starting with distal to proximal shunts, and then progressing to vein-shunting as needed. The goal is to resolve the priapism rapidly and safely. Distal corporoglanular shunts are intended to alleviate compartment syndrome by releasing blood that has become confined within the corpora. In addition to the sequential shunting approach, there are alternative surgical procedures for managing priapism. These may include the Ebbehoj shunt, the T-shunt with or without intracavernous tunneling, and the Al-Ghorab shunt. The Al-Ghorab shunt involves removing a portion of the tunica albuginea from the bilateral apex of the corpora cavernosa to drain blood from the penis and reduce the risk of sudden shunt closure. Pulmonary embolism and local thrombus development can make vein shunts more difficult to manage, and proximal or vein shunts have greater rates of erectile dysfunction. The duration of priapism is an important factor in the development of erectile dysfunction.
Priapism in leukemia is caused by a buildup of white blood cells that slows down blood flow, disrupting the balance of nitric oxide and cGMP, leading to an occlusion and prolonged lack of blood flow.1 Before the availability of tyrosine kinase inhibitors, 85% of CML diagnoses were in the chronic phase, with the majority of patients being under 40 years and having a mean age of 27.4 years.22,23 In adults without CML, the incidence of priapism is highest between 20-50 years of age, and up to 30% of these patients may have a platelet count above 600 × 109/L. However, in CML patients with stuttering priapism, the platelet count is usually lower.23 Ethnicity is significant, with 57% of cases being reported in Asian individuals, and priapism has been reported in patients who have compliance issues or who have stopped taking their medication.1 It is a serious urologic condition that requires prompt treatment to prevent erectile dysfunction.
CML patients with priapism typically seek medical attention after an average of 78.28 hours, which increases their risk of developing erectile dysfunction.24 Imatinib, a first-line tyrosine kinase inhibitor, has improved the prognosis, but has been shown to reduce sperm density, count, survival rates, and activity in chronic phase. Urological aspiration and irrigation should be used instead of oral medication, and leukapheresis can be used for both purposes.25 Four techniques are used to treat priapism: percutaneous distal shunts, open proximal shunts, and vein anastomoses/shunts. Guidelines recommend taking an aggressive approach by proceeding with distal to proximal to vein shunting in a quick and safe manner to restore penile flaccidity.1,25 Erectile dysfunction is more likely after proximal or vein shunts, but it’s challenging to attribute the dysfunction to the shunt.1
Early and timely intervention is necessary to treat priapism, which can negatively impact response to treatment and erectile function. Physicians must closely monitor patients for developing erectile dysfunction.
Written informed consent for the publication of the clinical details and images was obtained from the patient and his family.
All data underlying the results are available as part of the article and no additional data sources are required.
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Is the background of the case’s history and progression described in sufficient detail?
Yes
Are enough details provided of any physical examination and diagnostic tests, treatment given and outcomes?
Yes
Is sufficient discussion included of the importance of the findings and their relevance to future understanding of disease processes, diagnosis or treatment?
Yes
Is the case presented with sufficient detail to be useful for other practitioners?
Yes
Competing Interests: No competing interests were disclosed.
Reviewer Expertise: urology
Is the background of the case’s history and progression described in sufficient detail?
Yes
Are enough details provided of any physical examination and diagnostic tests, treatment given and outcomes?
Partly
Is sufficient discussion included of the importance of the findings and their relevance to future understanding of disease processes, diagnosis or treatment?
Yes
Is the case presented with sufficient detail to be useful for other practitioners?
Yes
Competing Interests: No competing interests were disclosed.
Reviewer Expertise: CML: epidemiology, diagnosis, and treatment.
Alongside their report, reviewers assign a status to the article:
Invited Reviewers | ||
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Version 1 20 Nov 23 |
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