Thirty-five patients were operated for hydatid disease of the liver. There was no postoperative mortality. After total pericystectomy and partial pericystectomy, morbidity and mean time of hospitalization were 15 and 33%, and 11 and 22 days, respectively. If total pericystectomy may now be considered as the gold standard, the procedure may not be applicable to all hydatid cysts. The surgical treatment should take into account individual patient factors as well as anatomical relationships of the cyst with major hepatic vessels or vena cava.