<prompt> Saw-tooth appearance on barium enema is characteristic feature ofCrohns diseaseCarcinoma colonUlcerative colitisDiverticulosis  <response>: D Diverticulosis Diverticulosis shows thickening of the circular muscle fibres of the intestine, which develops a concertina or saw-tooth appearance on barium enema. X Ray Findings - Abdomen Contrast Barium: Birds Beak deformity of lower oesophagus - Achalasia cardia Barium Swallow Rat tail tapering of lower oesophagus - Carcinoma oesophagus Barium Swallow Cork screw oesophagus - Diffuse oesophageal spasm Barium Swallow Commonest radiological appearance of gastric carcinoma in barium meal follow through is - filling defect in antrum body of stomach Trifoliate duodenum - Chronic duodenal ulcer with scarring Barium Meal Hour Glass stomach - Peptic ulcer Cup Spill Cascade stomach - Volvulus of stomach Constriction of transverse duodenum - superior mesenteric artery syndrome Bulls eye lesion in barium meal - Leiomyosarcoma Single-bubble appearance - pyloric stenosis Double-bubble sign - Duodenal atresia, duodenal stenosis, annular pancreas Triple-bubble sign - Jejunal atresia Coffee bean sign - Strangulation of incompletely obstructed loop of small intestine String of Beads - Small bowel obstruction Coiled spring appearance - Intussusception Pincer-shaped ending in barium enema - Intussusception Bird of Prey sign - Sigmoid volvulus Moulage sign flocculation of barium, with mucosal thickening - seen.in - malabsorption syndrome String sign of Cantor - Crohns disease Pipe-stem appearance Loss of Frustrations- Ulcerative Colitis Barium Enema Saw-tooth appearance and or diverticula - Diverticular disease Diverticulosis Barium Enema Scalloping of edge of sigmoid colon on barium enema - Ulcerative colitis Napkin ring sign - Annular carcinoma of colon Porcelain gall bladder - Carcinoma of gall bladder Pad sign - Carcinoma pancreas Barium Meal ERCP: Scrambled-egg appearance - Carcinoma of pancreas Chain of Lakes appearance - Chronic pancreatitis Double duct sign - Carcinoma of pancreas PTC: Meniscus sign - Choledocholithiasis 