[Cystic cervical and mediastinal lymphangioma: a case report and review of the literature].

Cervical and mediastinal cystic lymphangioma are rare and benign tumours. They looked like a lateral and cervical mass. Medical imaging allows to suspect the diagnosis but histology only may to assert it. The best therapy is surgery. Sclerosis by chemical drugs is only an alternative if surgery is not possible. A recovery is completely obtained if the whole tumour is removed.