Introduction
Priapism, defined as a prolonged and often painful penile erection without sexual arousal, constitutes a urological emergency requiring immediate intervention. While commonly associated with conditions like sickle cell anemia and certain medications, malignancy-related priapism is rare and frequently overlooked. Herein, we present a unique case of a 31-year-old male with no significant medical history, who developed persistent priapism as the initial presentation of chronic myeloid leukemia (CML).
Case Presentation
A 31-year-old male without significant medical history, presented to the emergency department with painless priapism, was evaluated by urology and discharged home with precautions. He returned the following day with persistent, now painful priapism. Upon examination, his vital signs were stable. Urology performed aspiration and injection with Sudafed, resulting in mild symptom improvement. Laboratory findings revealed elevated white blood cell count (563.64 k/mcL), anemia (hemoglobin 8.4 g/dL), and a peripheral blood smear showed immature circulating cells with blast forms. He was transferred to a tertiary care center where conservative management addressed bleeding from the penile injection site, with subsequent treatment including leukapheresis and hydroxyurea for cytoreduction. Imaging revealed severe splenomegaly (36 cm) with abdominal mass effect. Peripheral flow cytometry didn’t show malignancy, but cytogenetic analysis showed a BCR/ABL1 fusion gene, confirming chronic myeloid leukemia (CML). Bone marrow biopsy showed hypercellularity without increased blasts. Treatment with dasatinib reduced the white count to 52,000 k/mcL, and was discharged home.
Discussion
Priapism is a urological emergency necessitating immediate intervention to prevent erectile dysfunction and permanent impotence. Management aims to achieve detumescence and typically involves methods such as irrigation or injection of vasoconstrictors into the penis. Malignancy-associated priapism (MAP) often results from venous obstruction due to hyperviscosity. Studies show that CML accounts for approximately 50% cases presenting with MAP, predominantly affecting younger individuals with a mean onset around 27 years of age. Priapism can occur before, during, or after treatment initiation or splenectomy in these patients. Providers should keep a high threshold of suspicion for MAP in patients with no other risk factors as prompt identification and treatment are needed to avoid permanent injury.
