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Case Report

Case Report: Severe ischemic priapism as the clinical presentation in patient with chronic myeloid leukemia (CML) treated by proximal shunt

[version 1; peer review: 1 approved, 1 approved with reservations]
PUBLISHED 20 Nov 2023
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Abstract

Background: Priapism refers to an erection of the penis that persists for four hours or more and is not associated with sexual arousal or stimulation. This condition is thought to be caused by abnormal production of blood cells in the bone marrow, which leads to the release of certain chemicals into the bloodstream. The current article presents a severe ischemic priapism case, and assesses and contrasts the documented instances of patients with chronic myelogenous leukemia (CML) who experienced priapism as their primary clinical symptom over the last two decades.

Case presentation: The 21-year-old male patient presented with persistent and painful erections for three days. Further tests revealed he had CML and ischemic priapism. He was treated with distal shunting and proximal shunting with cytoreductive therapy to resolve the symptoms.

Conclusions: Priapism is a medical emergency that can cause permanent damage to the erectile tissue if not treated promptly. Prolonged and painful erections can cause ischemia, leading to tissue damage and decreased function. If priapism is caused by an underlying medical condition; delaying treatment can allow the underlying condition to progress and become more difficult to treat.

Keywords

Priapism, Chronic myeloid leukemia, Distal shunting, Proximal shunting

Introduction

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

Case report

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.

488ec235-a7c2-4150-ba5b-853ec09324bf_figure1.gif

Figure 1. The genitalia showed a painful erection (three days).

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).

488ec235-a7c2-4150-ba5b-853ec09324bf_figure2.gif

Figure 2. Peripheral blood smear results suggesting a hematologic malignancy.

488ec235-a7c2-4150-ba5b-853ec09324bf_figure3.gif

Figure 3. Ultrasonography (USG) and Doppler Ultrasound (US) results showing low-flow priapism with penile edema.

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

488ec235-a7c2-4150-ba5b-853ec09324bf_figure4.gif

Figure 4. The patient after Winter’s procedure (distal shunt).

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).

488ec235-a7c2-4150-ba5b-853ec09324bf_figure5.gif

Figure 5. The patient then underwent surgery through the proximal shunting.

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.

488ec235-a7c2-4150-ba5b-853ec09324bf_figure6.gif

Figure 6. The patient after proximal shunting.

Discussion

Chronic myeloid leukaemia (CML)

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

Table 1. Overview of case reports and reviews.

First authorYear of publication
Ali12021The prompt administration of CML treatment may facilitate the prompt resolution of priapism and may be essential for achieving complete remission of the condition.
Chowdhury262020Six patients with CML were treated with minimally invasive procedures and one required a proximal shunt, all referred to a hematologist for proper management.
Jandial272019Treatment response was favorable, but long duration of symptoms and leukocytosis likely led to ischemic priapism and ED.
Kumar and Garg282018On 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.
Tendulkar292017Leukapheresis was successful in reducing white blood cell count and symptoms of leukostasis, with 1.6 sessions needed.
Ekeke302015Priapism was diagnosed in two patients with CML, but treatment methods were not specified.
Kurosawa312015Imatinib and hydroxycarbamide treatment may have resulted in erectile dysfunction in two CML patients.
Pal322015Four 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.
Nabi332000The seven patients had successful detumescence after treatment with Winter shunts, hydroxycarbamide, and allopurinol, but none had potency during follow-up.

Abbreviations: CML, chronic myeloid leukemia; ED, erectile dysfunction; SD, standard deviation; WBC, white blood cell.

Priapism

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

Classification of priapism

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

Pathophysiology of priapism

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.1921 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

Table 2. Instances of priapism and leukemia have been reported in the past two decades.

Author (s)Age (years) and diagnosisDuration of the complaintWhite blood cellsSigns, symptoms, and treatment
103 cell/mm3
Gaye, Thiam et al. 20203446, Chronic myeloid leukemia48 hours526

  • - Hepatosplenomegaly

  • - Puncturing the corpus cavernosum, and administering phenylephrine solution alongside the medications (i.e., hydroxiurea and imatinib)

Dhar, Chhabra et al. 20193552, Chronic myeloid leukemia4 hours239

  • - Anaemic conjunctivae, hepatomegaly, and splenomegaly.

  • - Winter's procedure, aspiration failure, imatinib, and hydroxyurea

Qu, Lu et al. 20183618, Chronic myeloid leukemia1 week257

  • - Enlargement of liver and spleen.

  • - Phenylephrine injection to the corpus cavernosum, aspiration failure

  • - Winter's procedure, and use of the medication imatinib.

Becerra, Jimenez et al. 20183752, Chronic myeloid leukemia6 days282

  • - General fatigue, pale appearance, unintended loss of weight.

  • - Drainage and irrigation of the corpus cavernosum; and surgical penile shunts.

Khan, Shafiq et al. 20183816, Chronic myeloid leukemia11 days614

  • - Splenomegaly, hepatomegaly, and a general paleness.

  • - Draining and irrigating the corpora cavernosa, as well as undergoing a Winter’s procedure. Injecting the hydroxyurea medication.

Nerli, Magdum et al. 20163919, Chronic myeloid leukemia24 hrs296

  • - Anaemic conjunctivae, enlargement of liver and spleen.

  • - Irrigation and aspiration of the corpus cavernosa using phenylephrine solution.

  • - Additional injected medications such as hydroxiurea and imatinib.

Shaeer, Shaeer et al. 20154021, Chronic myeloid leukemia6 days410

  • - Dyspepsia’s symptoms, hepatomegaly, and splenomegaly

  • - Phenylephrine injection, aspiration failure, prosthetic penis, and imatinib to the corpus cavernosa

Farhan, Anjum et al. 20154138, Chronic myeloid leukemia30 hrs155

  • - Abdominal discomfort, weight loss, hepatosplenomegaly, and pale conjunctivae

  • - Administering the phenylephrine through punctures to the corpus cavernosum, hydroxiurea, and imatinib; aspiration failure.

Gupta, Seth, Gupta 20094212, Chronic myeloid leukemia2 days346

  • - General paleness, enlargement of spleen and liver

  • - Hydroxyurea, terbutaline, and imatinib.

Jameel and Mehmood 20094321, Chronic myeloid leukemia8 hrs316

  • - Hepatosplenomegaly, anaemic conjunctivae, abdominal discomfort, weight loss, nosebleed.

  • - Puncturing the corpus cavernosum using phenylephrine, aspiration failure; hydroxiurea.

55, Chronic myeloid leukemia12 hrs282

  • - Pale conjunctival mucosa.

  • - Aspiration and taking hydroxiurea medication.

Ponniah, Brown and Taylor 20044419, Chronic myeloid leukemia18 hours513

  • - Asymptomatic

  • - Aspiration failure and leukapheresis. Treatment for CML was not available.

Chang et al. 20034521, Chronic myeloid leukemianot available217

  • - Weight loss, enlarged spleen and liver, anaemic conjunctivae, and profuse bleeding.

  • - Phenylephrine-induced corpus cavernosum puncture, aspiration failure, hydroxiurea, and interferon-2

Note: All patients on this table list have painful priapism.

Surgical management of priapism

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 CML patients

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

Conclusions

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.

Ethics and patient consent

Written informed consent for the publication of the clinical details and images was obtained from the patient and his family.

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Dahril D and Ramadhan S. Case Report: Severe ischemic priapism as the clinical presentation in patient with chronic myeloid leukemia (CML) treated by proximal shunt [version 1; peer review: 1 approved, 1 approved with reservations]. F1000Research 2023, 12:1487 (https://doi.org/10.12688/f1000research.133785.1)
NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article.
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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
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Reviewer Report 07 May 2024
Muhammad Asykar Palinrungi, Hasanuddin University, Makassar, Indonesia 
Approved
VIEWS 2
This case report is interesting by describing a case of priapism caused by chronic myeloid leukemia (CML) as well as initial and advanced management.
I have several concerns:
Abstract
Introduction: Here the author explains directly the etiology ... Continue reading
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Palinrungi MA. Reviewer Report For: Case Report: Severe ischemic priapism as the clinical presentation in patient with chronic myeloid leukemia (CML) treated by proximal shunt [version 1; peer review: 1 approved, 1 approved with reservations]. F1000Research 2023, 12:1487 (https://doi.org/10.5256/f1000research.146798.r264425)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
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Reviewer Report 29 Apr 2024
Wulyo Rajabto, Medicine Universitas Indonesia, Jakarta, Indonesia 
Approved with Reservations
VIEWS 7
This case report is very interesting which describes an oncology emergency of how we treat priapism caused by chronic myeloid leukemia (CML).  
The physical examination of patients with CML usually shows splenomegaly, however, this case report does not show ... Continue reading
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HOW TO CITE THIS REPORT
Rajabto W. Reviewer Report For: Case Report: Severe ischemic priapism as the clinical presentation in patient with chronic myeloid leukemia (CML) treated by proximal shunt [version 1; peer review: 1 approved, 1 approved with reservations]. F1000Research 2023, 12:1487 (https://doi.org/10.5256/f1000research.146798.r252626)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.

Comments on this article Comments (0)

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Comment
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
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