<prompt> Type II Mirizzis syndromeObstruction of common duct by external compression onlyno erosionErosion of one-thirds circumference of common ductErosion of upto two-third circumference of common ductTotal near total circumferential of common duct  <response>: Classification of Mirizzis Syndrome Csendes classification Type I Obstruction of common duct by external compression onlyno erosion Type II Erosion of less than one-third circumference of common duct Type III Erosion of upto two-third circumference of common duct Type IV Totalnear total circumferential destruction of common duct Type V Erosion of GB in common duct with cholecystoenteric fistula Ref: Sabiston 20th edition Pgno :1520 