<prompt> Thumb print sign is seen in: March 2011Crohns diseaseDeal carcinomaIschemic colitisLymphoma of colon  <response>: Ans. C: Ischemic colitis Earlier features of intestinal ischemia seen on abdominal radiographs include bowel wall edema, known as thumb printing. Radiological signs in GIT: Thumb printing sign: Ischemic colitis Bird of prey sign: Sigmoid volvulus Double bubble sign X-ray abdomen: - Annular pancreas - Duodenal atresia String sign: - Crohns disease - Pyloric stenosis Single bubble sign: Pyloric stenosis Chain of lake appearance: Chronic pancreatitis Fox sign: Acute pancreatitis Widening of duodenal C loop: Carcinoma of head pf pancreas 