A case of oncocytic carcinoma at the base of the tongue with cervical lymph node metastasis and literature review

Oncocytic carcinoma of tongue is extremely rare. This paper reports a case of malignant transformation from oncocytic adenoma to oncocytic carcinoma. A 29-year-old man complained of pharyngeal bleeding and swallowing obstruction. The tumor at the base of the tongue was surgically removed and the pathological diagnosis was oncocytic adenoma. After 5 years, the patient found a tumor of the right neck and felt pharyngeal bleeding and swallowing obstruction again. The next year, he was treated with surgery, chemotherapy and radiotherapy, and was diagnosed as oncocytic carcinoma with cervical lymph node metastasis. The patient showed no sign of recurrence until 30 months after the second operation, when tumor of tongue was detected by electronic laryngoscope. Surgery, chemotherapy and radioactive seed implantation were adopted again. Up to now, the follow-up data showed no evidence of recurrence.