Abstract
A metastatic tumor from colorectal carcinoma is very rare. There have been no previous reports of colorectal carcinoma metastasis with bone formation in the oral and maxillary regions. We report a case of suspected metastasis at the left temporomandibular condyle from colorectal carcinoma, which showed bone formation on computed tomography.
A 74-year-old man was referred to our department for oral examination from the Department of Surgery. He had a past history of colorectal carcinoma, and underwent right hemicolectomy and lymphadenectomy. Post-operative chemotherapy was performed for recurrence and metastasis. In our department, computed tomography of the head and neck region showed swelling and calcification at the left mandibular condyle. We performed fine needle aspiration cytology. The results showed atypical cells similar to the characteristics of adenocarcinoma. A review of previous and recent magnetic resonance imaging confirmed multiple metastases to the skull and the appearance of a tumor around the left mandibular condyle. FNA and CT/MRI examination results led us to suspect metastatic colorectal carcinoma with bone formation at the left temporomandibular condyle.
