9th June 2025

A 60-year-old male patient with ulcerative colitis who is a smoker of a ten pack-year history, presented to the accident and emergency department complaining of a painful, purple ulcer, of irregular edges, over the anterior shin.

A 60-year-old male patient with ulcerative colitis who is a smoker of a ten pack-year history, presented to the accident and emergency department complaining of a painful, purple ulcer, of irregular edges, over the anterior shin. What is the most likely diagnosis? 

Select the SINGLE most appropriate option from the list below. Select ONE option only.