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Primary fibrosarcoma of the thyroid gland--a case report.

A 54-year-old woman, a teacher with a two-year history of a thyroid gland enlargement was referred to the Surgeon Ward with a preliminary cytological diagnosis of schwannoma. Histological examination of the resected tumour revealed a malignant mesenchymal tumor and a primary fibrosarcoma of the thyroid gland was ultimately confirmed. Currently, a follow-up, with further clinical investigations has been recommended.