<prompt> Chain of lakes appearance is seen in:Carcinoma pancreasChronic pancreatitisAcute pancreatitisPancreatic pseudo cyst  <response>: Ans: b Chronic pancreatitis Ref: Sutton, 7th ed,p. 790Dilatation and beading of main pancreatic duct and calcification is pathognomonic of chronic pancreatitis.Typical ERCP appearance include:1. String of pearls2. Chain of lakes3. Rat tail appearanceSome important radiological appearancesSigmoid volvulus Bird of prey sign - Bird beak sign Omega sign Bent inner tube sign Coffee bean sign Carman meniscal signCole signCoiled spring signSterlin sign, Fuscher s signChiladiti sign - malignant gastric ulcer- duodenal ulcer- intussusceptions- TB caecum- colon bw liver and diaphragm 