[Cystic lymphangioma on the floor of the oral cavity extending to the submandibular region in adult patients].

Cystic lymphangiomas are congenital benign lesions occurring predominantly in the head and neck area, especially in the posterior cervical triangle. These malformations involving the lymphatic vessels are frequently diagnosed in children. We report the clinical case of a 28-year-old adult patient with cystic lymphangioma on the floor of the oral cavity extending gradually to the left submandibular region. The clinically suspected tumor was thoroughly explored using tomodensitometry. The treatment consisted of complete resection, endo-orally performed, associated with histological examination confirming the macroscopic diagnosis of cystic lymphangioma. Follow-up at 4 years showed no recurrence.