Congenital cystic dilatation of common bile duct is a rare condition in Africa and the West. Its discovery is often fortuitous. The diagnosis is based on imagery. Our goal was to report 3 cases followed by a literature review. Three patients were received, most often for pain of the right hypochondrium. There were 2 women and 1 man aged between 16 and 27 years old. The physical examination was normal. The abdominal CT scan allowed us to diagnose a IA Todani cyst in all patients, including one degenerate. Cholecystectomy with resection of the bile duct, followed by hepatico-jejunal anastomosis on anseen-Y of Roux was performed in 2 patients. The immediate suites were simple. Histology showed inflammation on 2 operative specimen and cholangiocarcinoma on the 3rd. Choledochal DKC is a rare condition, often revealed in adults by complications. Bilio-pancreatic CT is an alternative to cholangio-MRI for its diagnosis with a type I Todani easily recognized. The treatment is surgical with a bad prognosis in case of degeneration.