Persistent Thumb Lesion in a Middle-aged Man
By Daniel Stulberg, MD
A 57-year-old man presented to clinic with this persistent skin lesion on his thumb. Three months ago, he lanced the lesion, producing some purulence and blood. Since then, it has bled almost daily and has not healed. He was treated with silver nitrate by another clinician after one month, but the lesion persists. His past medical history is significant for diabetes and his family history is significant for 2 cousins with melanoma.