Abstract
A 56-year-old man suffering from a sore throat on swallowing, of six months duration, attended our clinic. There was an elastic hard tumor in the left lobe of the thyroid gland and a swollen jugular chain lymph node was palpable. CT scan showed a non-enhanced mass invading the esophagus, with calcification on the dorsal side of the thyroid gland. A preoperative cytological study using fine needle aspiration diagnosed the tumor as a papillary carcinoma. The patient underwent a left lobectomy of the thyroid gland and left conservative neck dissection. The initial pathological diagnosis was anaplastic carcinoma, and postoperative radiation therapy was provided. However, the clinical course of this patient was not compatible with that of anaplastic carcinoma. The patient was ultimately diagnosed as a case of epithelioid hemangioendothelioma (EH) by immunohistochemical study. EH is a rare tumor, and EH originating from the thyroid gland has not been previously reported.
