[Giant retroperitoneal cystic lymphangioma in adults].

Objectives: To report one case of retroperitoneal cystic lymphangioma in an adult patient.

Methods: We describe the case of a 70 year-old female patient who complained of periumbilical pain and progressive increases of abdominal perimeter over a few months. Physical examination showed a great abdominal mass; CT scan confirmed its cystic nature. The indication of surgery was established.

Results: complete lesion excision. Pathology report showed the definitive diagnosis of cystic lymphangioma. No evidence of disease after one year.

Conclusions: We emphasize that it is an unfrequent type of retroperitoneal neoplasias in the adult age. We concur with other authors in the importance of complete excision.