<prompt> Grey Turners sign Flank discolouration is seen inAcute pyelonephritisAcute cholecystitisAcute pancreatitisAcute peritonitis  <response>: Signs indicative of retroperitoneal bleeding in severe pancreatitis Flank ecchymosis - Grey Turner sign Periumbilical ecchymosis- Cullens sign Inguinal ecchymosis - Fox sign Ref: Sabiston 20th edition Pgno : 1527 