All are complications of ulcerative colitis, except:: (A) Haemorrhage, (B) Stricture, (C) Malignant change, (D) Fistula formation
Answer is D. Fistula formation is a hallmark feature of Crohn's , since the transmural inflammation is the norm in Crohn's disease. In ulcerative colitis it is always a paial thickness involvement and hence the fistula is not formed.