A case of squamous cell carcinoma of the lower gingiva with multiple metastases to the lateral lingual lymph nodes is reported.
A 57-year-old man was given a diagnosis of moderately differentiated cT2N2bM0 squamous cell carcinoma of the left lower gingiva. Radical neck dissection, marginal mandibulectomy, and reconstruction with a metal plate were performed.
Preoperative computed tomography and magnetic resonance imaging revealed two masses 5 to 8 mm in diameter outside of the left genioglossus muscle. The masses were enucleated and suspected of be lymphoepithelial cysts on intraoperative frozen section examination.
However, the final pathological diagnosis was lymph-node metastasis. Resection of the oral floor and external radiation and chemotherapy were performed as additional treatment.
No evidence of disease was noted during more than 6 years of follow-up.