<prompt> Backwash ileitis is seen in:Crohns diseaseUlcerative colitisColonic carcinomaIleal polyp  <response>: 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. 