摘要
Mixed medullary-follicular carcinomas （MMFCs） are tumors of the thyroid that display morphological and immunohistochemical features of both medullary and follicular neoplasms. These tumors are rare and less than 40 cases have been described in the literature since the early 1980s The term medullary-follicular thyroid carcinoma denotes a tumor which exhibits the features of a medullary carcinoma and shows positive expression of calcitonin on immunohistochemistry. It is a follicular-derived thyroid carcinoma and is positive for thyroglobulin expression within the same tumor. Most reported cases have lymph node involvement at the time of diagnosis. In cases having disease progression, distant metastases develop in the lung, liver, mediastinum and bone. We report a case of a male patient with mixed medullary-follicular thyroid carcinoma and a review of the literature.
