Diagnosis (Treatment): A necrotizing, systemic vasculitis. It is most predominant in young males and is characterized largely by ulcerations of the oral mucosa and the genitalia. It can also involve joints, CNS, eyes, and the GI tract - predominantly the small bowel. Often it is characterized by deep, cratered ulcerations which may result in bleeding or perforation.

a) Crohn's disease
b) Behçet's disease
c) Ulcerative colitis
d) Diverticulitis