Purpose: Thyroid carcinomas have been incidentally found in the cervical lymph nodes during operation of head and neck squamous cell carcinoma (SCC) and such carcinomas have been considered metastatic.
Patients and Methods:We encountered 3 cases of incidental papillary carcinoma in the neck of patients with oral SCC and reviewed 75 cases previously reported.Results: Papillary carcinomas were found in 3, 10 and 3 lymph nodes in cases 1, 2 and 3, respectively. CT examination revealed 2 tumor-like shadows and 1 calcified mass in the cases 2 and 3, respectively. These shadows did not enlarge during the 3 to 5 years of observation and all patients have been alive without any event at the neck and thyroid gland. In reviewed cases, approximately two-fifths were histopathologically or clinically free from thyroid carcinoma.
Conclusion:We proposed a possibility that occult thyroid carcinoma is not necessarily metastatic but occasionally arises from the heterotopic thyroid tissues.3
We report a case of lingual osseous choristoma, a rare benign lesion. A 32-year-old woman was referred to our clinic because of a painless polypous tumor on the posterior part of the dorsum of the tongue. There was an elastic hard mass approximately 5mm in diameter on the left side of the cecal foramen of the tongue. We performed excision of the tumor with the patient under local anesthesia. Histologically, the lesion was a well-circumscribed mass of dense lamellar bone with Haversian canals. The postoperative course was uneventful, with no recurrence for about 18 months. Since 1938, when Muta reported the first case in Japan, 37 cases of oral osseous choristoma have been reported, including 34 arising on the tongue. The clinical findings of lingual osseous choristomas were reviewed, and their pathophysiology was discussed.
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