He has also been aware of recurrent bouts of abdominal pain and bloody diarrhoea

A 42-year-old male presents with this lesion on his leg which has been present for approximately three months and is minimally painful. He has also been aware of recurrent bouts of abdominal pain and bloody diarrhoea.
What is the most likely diagnosis?

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  1. Acute intermittent porphyria (AIP)
  2. Collagenous colitis
  3. Crohn’s disease
  4. Glucagonoma
  5. Ulcerative colitis (UC)