<prompt> Most common Morphological difference between Ulcerative Colitis and Crohns disease:Crypt abscessDiffuse polypsMucosal edemaLymphoid aggregates  <response>: Ans. a Crypt abscessRef: Bailey and Love 27th Edition Page 1268 Table, Surgery Sixer 3rd Edition page 429This question is asked based on a Table in Bailey and Love FeatureUlcerative ColitisCrohns DiseaseRectumAlways involvedOften SparedPerianal lesionsRareCommonStrictures in BowelRareCommonFistulasRareCommonGranulomasABSENTCommonFissuresABSENTCommonCrypt abscessCommonRareThe same question if had choice as granuloma, go with granuloma because very rarely Crypt abscess may be seen in CD also. 