Abstract
Carcinosarcoma (true malignant mixed tumor) of the parotid gland is an extremely rare tumor that is composed of both carcinomatous and sarcomatous components. We report a case of a 67-year-old woman with a carcinosarcoma of the left parotid gland. The patient had a parotid tumor showing enlargement for 3 months, and the tumor was resected. Histological examination showed carcinosarcoma, which contained undifferentiated carcinoma as a carcinomatous component and chondrosarcoma as a sarcomatous component. Because this tumor is very aggressive and has a high frequency of recurrence and metastasis, she underwent total parotidectomy with facial nerve resection, left radical neck dissection, and postoperative radiotherapy. After the postoperative radiotherapy, she underwent facial nerve reconstruction. She was alive without recurrence or metastasis at the 12-month follow-up, but we need to continue long-term close follow-up.
