[Treatment of residual and recurrent biliary calculi: the surgical option].

Retained and recurrent bile duct stones can be treated with a variety of non-surgical methods. The list includes endoscopic papillotomy, chemical dissolution, by T-tube extraction, percutaneous or extracorporeal lithotripsy. The various attempts at non-surgical therapy are described in two patients with retained bile duct stones before biliary clearance was achieved by re-operation. The failure of oral dissolution using biliary acids, endoscopic papillotomy and by T-tube extraction, led to a delay of 6 and 8 months respectively in the elimination of the retained stones in each patient. Surgical re-exploration proved relatively simple due to the long interval after the first operation, and the stones were removed without particular difficulties. The paper underlines the importance of the choice of treatment for use in cases of secondary common bile duct calculi, evaluated on the basis of a correct assessment of the cost/benefit, risk/benefit ratios.