<prompt> A 21yrs. old pt. attended a party the previous night and gives the following symptoms pain in abdomen radiating to back, pulse 100 min, BP 10076temp 39deg C and vomiting before coming Most probable dx is :Acute appendicitisAcute cholecystitisAcute diverticulitisAcute pancreatitis  <response>: Ans. is d ie Acute Pancreatitis The signs and symptoms exhibited by the pt. correlate with that of acute pancreatitis, most characterstic of which is - Radiation of pain to back and party in previous night ie. ho alcoholOther imp. diagnostic clue not given in question is- Relief from pain on sitting in upright posture.Some imp, points about Acute PancreatitisEtiology - Gall stones 50 - 70 i.e. MC causeAlcohol 25 OthersGrey Turner sign or Cullens sign :Bleeding into the fascial planes in acute pancreatitis can cause 1 discolouration of - flanks in Grey Turner signMnemonic : Cullens -Umbilicusumbilicus in Cullens sign Plain abdominal x-ray findings -include a sentinel loopa colon cut off signa renal halo sign 