Backwash ileitis is seen in:: (A) Crohn's disease, (B) Ulcerative colitis, (C) Colonic carcinoma, (D) Ileal polyp
Answer is B. BACKWASH ILEITIS: - Extends contiguously backward from cecum without skip regions. - It is seen in ulcerative colitis where eventhough small intestine is normal, mild mucosal inflammation of distal ileum is seen.