The authors report a case of a common bile duct cyst in a 19-year-old patient referred for the management of chronic pain in the right hypochondrium, without other associated symptoms. The abdominal computed tomography scan revealed a bile duct cyst confirmed by abdominal magnetic resonance imaging (MRI) (type 1c according to Todani). Laparotomy had revealed a common bile duct cyst. The procedures consisted of a resection of the main bile duct and cholecystectomy + hepatico-jejunal anastomosis (Roux-en-Y method). The anatomopathological examination had shown a fibrous-walled bile duct cyst with epithelial hyperplasia and dysplasia without signs of malignancy. The post-operative follow-up was simple and the return home had taken place on the 7 th postoperative day. The patient had been seen for routine check-up 51 days after surgery. She was in apparent good health without particular complaints.