<prompt> Skip lesions are seen inUlcerative colitisCrohns diseaseTyphoidTuberculosis  <response>: in ileocaecal tuberculosis,.Ulcerative--commonest 60. Circumferential transverse often multiple girdle ulcers - with skip lesions. It i common in old, malnourished people. skip lesions are typical in the case of crohn;s diseaseskip lesions are also observed in wet gangrene and necrotizing enterocolitis . ref:SRB;s manual of surgery,ed 3,pg no 513 