Priapism as an initial manifestation in an adult patient with chronic myeloid leukemia in Japan: case report and review of the literature.

We report the first documented Japanese case in the English literature of chronic myeloid leukemia (CML) in which priapism was the presenting symptom. Priapism, a rare manifestation in CML patients, is particularly uncommon in Japan. This can be attributed to the high quality of medical services and proactive health strategies implemented by the Japanese government. These strategies include recommending regular blood tests for company employees aged 35 and above, thereby facilitating early detection of CML. Hence, it is crucial to consider CML when examining any patient presenting with priapism, particularly among those who have not undergone regular medical check-ups.