<prompt> Crohns disease affectsStomachIleumColonAll of the above  <response>: Ans. d All of the above. Ref. Bailey Love, Surgery, 25thpg. 1173; Sabiston 18th ed. Table 48-5 CROHNS COLITISULCERATIVE COLITISSymptoms and SignsDiarrheaCommonCommonRectal bleedingLess commonAlmost alwaysAbdominal pain crampsModerate to severeMild to moderatePalpable massAt timesNo unless large cancerAnal complaintsFrequent 50Infrequent 20Radiologic FindingsIleal diseaseCommonRare backwash ileitisNodularity, fuzzinessNoYesDistributionSkip areasRectum extending upward and continuouslyUlcersLinear, cobblestone, fissuresCollar-buttonToxic dilationRareUncommonProctoscopic FindingsAnal fissure, fistula, abscessCommonRareRectal sparingCommon 50Rare 5Granular mucosaNoYesUlcerationLinear, deep, scatteredSuperficial, universalDifferences between UC and CD-UC affects the colon; CD can affect any part of the Gl tract, but particularly the small and large bowel-UC is a mucosal disease whereas CD affects the full thickness of the bowel wal-UC produces confluent disease in the colon and rectum whereas CD is characterised by skip lesions-CD more commonly causes stricturing and fistulation-Granulomas may be found on histology in CD but not in UC-CD is often associated with perianal disease whereas this is unusual in UC-CD affecting the terminal ileum may produce symptoms mimicking appendicitis, but this does not occur in UC-Resection of the colon and rectum cures the patient with UC, whereas recurrence is common after resection in CD. 