Penile Ulcer due to Leukemia Cutis-A Rare Diagnosis Not to Be Missed.

We present a rare case of leukemia cutis presenting with an ulcer on the ventral penis. A 60-year-old Chinese man was referred for a penile ulcer of 10 days. He was diagnosed with acute myelomonocytic leukemia 6 months earlier and had received 2 cycles of venetoclax with azacitidine. He developed a spontaneous penile blister. It ulcerated after the patient pricked it with a needle. This enlarged after traditional medicated ointment was applied. He denied pain, itch, urethral discharge, systemic symptoms, or rashes elsewhere.