Abstract
Background. Sclerosing mucoepidermoid thyroid carcinoma (SMTC) is a recently recognized malignant neoplasm of the thyroid. SMTC was frst reported in 1991. It arises in a background of Hashimoto thyroiditis (HT). There are two variants of mucoepidermoid carcinoma of thyroid gland: the conventional and sclerosing variants. SMTC has recently been recognized as a separate disease entity by World Health Organization (WHO). Description of the clinical case. We present the case of a 51-year-old woman with a 2-year history of autoimmune thyroiditis with a thyroid nodule. The patient had no symptoms or signs of compression. The level of thyroid–stimulating hormone (TSH) was 15.8 (range 0.4-4.0), antibodies to peroxidase: 150 Iu/ml. Scintigraphy of the thyroid gland revealed a dominant cold nodule (1.5×2 cm) in the right lobe of the gland. The control ultrasound examination showed negative fndings. Fine needle aspiration cytology of the nodule revealed follicular lesion in a background of TH. Extrafascial thyroidectomy was performed. The patient was followed up for 10 months.
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