[Giant mediastinal cystic lymphangioma: clinical case and review of the literature].

Benign cystic lymphangioma is a relatively rare tumor of the human body. It's more frequent in young patients. It is usually localized in the neck but may have mediastinal or intra-abdominal localization. It's usually asymptomatic with good prognosis after total excision. We report in this article the case of a young man with a huge mediastinal cystic lymphangioma which was successfully operated and a review of the literature.