Bilateral Orbital Metastasis of Follicular Thyroid Carcinoma: a Rare Case Report

Iranian Journal of Pathology

Volume 9 - Number 3

Article Type: ---- Unspecified ----

Follicular thyroid carcinoma (FTC) is the second most common type of thyroid cancer after papillary carcinoma. It usually grows slowly and is clinically indolent; but rarely, its aggressive forms with distant metastases can occur. We report here an uncommon case of bilateral orbital metastasis of FTC. A 70-year-old woman presented with bilateral exophtalmus and past medical history of thyroid nodule surgery 15 years ago. Radiologic evaluation showed massive bilateral orbital mass with extension to calvarium. Tumor decompressed and removed with the suction and curettage and the patient was treated with chemoradiotherapy after operation. Pathologic examination showed metastatic follicular thyroid carcinoma. Although orbital metastasis of follicular thyroid carcinoma is uncommon, FTC should be considered as a potential primary neoplasm in a patient with orbital mass.

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