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[Malignant tumors of thyroid gland].

AIM: The incidence of thyroid cancer has been increasing. The aim of this work was to determine risk factors, diagnostic methods and extent of surgical treatment of malignant goiter.

MATERIAL AND METHODS: The authors retrospectively analyzed patients who were surgically treated for thyroid disease at the Department of Otorhinolaryngology, Head and Neck Surgery, Comenius University, Jessenius Faculty of Medicine, Teaching Hospital in Martin, Slovakia, from the January 1st, 2006 to December 31st, 2013, for thyroid disease. The incidence, risk factors of malignant thyroid tumors, indication for surgery and its complications were evaluated.

RESULTS: A total of 1,620 adult patients were surgically treated for thyroid disease at the Department of ENT, Head and Neck Surgery, CU JMF, UH in Martin, Slovakia, between 2006- 2013. Malignant tumors were identified in 238 patients (15%). Microcarcinoma (incidentally detected malignant tumor 1 cm) occurred in 78 cases (5%). Malignant thyroid tumor was more common in younger patients (p = 0.002). Newly created and larger nodules positively correlated with the occurrence of malignancy (p = 0.003, p = 0.041, resp.). Gender, family history of thyroid disorder, previous radiation therapy, and previous malignancy did not affect the incidence of malignant tumor of thyroid gland. High sensitivity and specificity in the dia-gnosis of malignant thyroid nodule was observed using aspiration cytology (75%, 97%, resp.) and intraoperative histopathological examination (88%, 100%, resp.).

CONCLUSION: Malignant tumor of thyroid gland is more common in younger patients with newly developed nodule. The risk factors of malignancy increase with the size of the thyroid nodule. Aspiration cytology and peroperative histopathology have high sensitivity and specificity in the dia-gnosis of malignant thyroid tumor; therefore, they should be a standard method in the dia-gnosis of nodular goiter. The method of choice in the treatment of thyroid malignancy is total thyroidectomy.

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