<prompt> Grey Turner sign is seen in:Ac pancreatitisCc pancreatitisAc cholecystitisAc parotitis  <response>: Ans: a Ac pancreatitis Ref: Bailey Love, 24th ed, p. 1123Grey Ttorner sign - Bleeding into fascial plane can produce bluish discoloration in flanksCullen sign - Bleeding into fascial plane can produce bluish discolouration around umbilicusNeither sign is pathognomonic of ac pancreatitis. Both these signs indicate severe necrotizing pancreatitis.Investigations of pancreatitis: Serum amylase four times increased Plain abdominal radiographic findingsSentinal loop is formed by jejunum in acute pancreatitis - generalized or local ileusColon cut - off signRenal halo signCalcified gall stones and pancreatic calcification - Non diagnostic signs Pleural effusion is present in 20 of cases Severe cases show features of ac respiratory distress syndromeSpecific serum markers of ac pancreatitis1. Serum lipase single best enzyme2. Pancreatic isoamylase3. TrypsinogenPrognostic criteria discussed above. 