<prompt> Mirizzis Syndrome isGB stone compressing common hepatic ductGB carcinoma invading IVC.GB stone causing cholecystitisPancreatic carcinoma  <response>: Mirrizs syndromeFunctional hepatic syndrome It is defined as obstruction of the common hepatic duct or CBD by external compression or by erosion of stone in the Hamann pouch or cystic duct. External compression has been classified as type I where as erosion as type II Mirrizs syndrome by McSherry Ref: Sabiston 20th edition Pgno :1510 