<prompt> Serpiginous ulcers with deep fissures are seen in?Crohns diseaseUlcerative colitisNeutropenic colitisAmoebic dysentery  <response>: Serpiginous ulcers are features of Crohns Disease. Pseudopolyps are seen in ulcerative colitis.FeatureCrohns diseaseUlcerative colitisDistributionSegmental with skip areasContinuous without skip areasLocationCommonly terminal ileum andor ascending colonCommonly rectum, sigmoid colon and extending upwardsExtentUsually involves the entire thickness of the affected segment of bowel wallUsually superficial, confined to mucosal layerUlcersSerpiginous ulcers may develop into deep fissuresSuperficial mucosal ulcers without fissuresPseudo-polypsRarely seenCommonly presentFibrosisCommonRareShorteningDue to fibrosisDue to contraction of muscularis 