Résumé
Choledochal cyst is an aneurysmal dilatation of the bile duct; it is a rare condition with an incidence between 1:100.000 and 1:150.000 live births in the developed countries, although it is probably more common in the developing countries. We report a case of choledochal cyst in a young 22 year-old female patient. She presented to the out-patient clinic with a history of right upper quadrant abdominal pain. The preoperative diagnosis was made by abdominal ultrasound. The patient made complete recovery after early laparotomy and excision of the cyst. Early suspicion of this rare disease is important because surgical treatment is the only way to avoid its dramatic complications. in this case report we discusse the history, physical examination, investigations, complications and treatment of this rare condition