Sixty-two cases of hydatid cyst of liver were treated and followed up between 1968 and 1982. Current pre-operative investigations include immunologic tests (immunoelectrophoresis, tests for hemagglutination inhibiting antibodies) and medical imaging (ultrasound, scanner). Vascular exploration is now very rarely performed. Surgical treatment is mainly by pericystectomy and was conducted in 90% of cases with a postoperative mortality of 5,2%. Chemotherapy with Albendazole was combined routinely.