[Cystic dilatation of the choledochus].

A case of choledochus cyst in a woman of 25 years old is reported. The total excision of the cyst with primary anastomosis to the duodenum o jejunum is the best operation, if it isn't possible or dangerous the elective technique is the cystojejunostomy in Roux-Y. It is suggested the advantage to resolve in the best form-excision or cystojejunostomy during the first operation for avoid eventual complications during the late intervention.