<prompt> Skip granulomatous lesions are seen in-Ulcerative colitisCrohns diseaseWhipples diseaseReiters disease  <response>: Ans. is 4b i.e., Crohns diseaseSkip lesions are characteristic of Crohns disease.o This pt. is suffering with Crohns ds.o The characterstics of Crohns ds and their comparison with Ulcerative colitis are given -Once you know them the answer becomes obvious.FeaturesUlcerative colitisCrohns dso Rectal involvemento Distribution of lesionso Mucosal appearanceo Associated ileal90ContinuousFriable, diffusely involved 10, mild, terminal ileal InflammationRectum spared in 50Skip lesionsCobblestone appearance 50 have combined ileal and colonic involvement.o Perianal abcess, fistulaso Intestinal strictures obstructiono Intestinal fistulaso Fissures Radiologicalo Toxic megacolono Extraintestinal Manifestation -RareNot seen Not seen Not seenRare but more than crohns dsCommonCommonCommonCommonVery rarey Sclerosing pericholangitisy Uveitis Arthritisy Pyoderma gangrenosumCommonCommonCommonRareCommonRarePathological Features o Depth of inflammationo Creeping mesentric fato Fibrous thickening of wallo Pseudopolypso Granulomaso Dysplasiao CarcinomaMucosalNot seenCommon lead pipeCommonNot seenCommon10TransmuralCommonRareRareCommonRareRare 