Primary Cavernous Hemangioma of the Thyroid Gland
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Hemangioma of the thyroid gland is a rare diagnosis and less than 35 cases have been previously published in the literature. The pathogenesis is unknown but it is suggested to be a developmental anomaly which is associated with an incapability of angioblastic mesenchyma to form canals. On microscopic examination, it should be distinguished from reactive endothelial hyperplasia, angiosarcoma or hemangiosarcoma. We report a case of a primary thyroid hemangioma, with nonspesific US appearance. Cytologic findings were nondiagnostic and final diagnosis was made at pathologic examination of the hemithyroidectomy specimen.