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Year : 2021  |  Volume : 4  |  Issue : 1  |  Page : 12-15

Thyroid carcinoma as a dural mass: A rare mode of presentation

Department of Pathology, Medical College, Baroda, India

Correspondence Address:
Dr. Sivaranjini Narayanan
TC40/733, Thoppu Lane, Sreevaraham, Manacaud, Trivandrum 695009.
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/IJNO.IJNO_21_20

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Context: Distant metastasis is a rare, primary manifestation of follicular carcinoma of the thyroid. Case Report: We report a case of a 72-year-old woman presenting with a solid mass located in the left parieto-occipital region. The 3D computed tomography (CT) showed a large solid mass supplied by branches of the external carotid artery. After magnetic resonance imaging, a probable diagnosis of meningioma was made. The patient underwent surgery where a soft mass invading the superior sagittal sinus was encountered and resected. Histological examination revealed a thyroid follicular neoplasm with positive staining for thyroglobulin and thyroid transcription factor I on immunohistochemical analysis. Postoperatively, levels of thyroid hormones were normal. Subsequent ultrasonogram revealed a nodule in the thyroid gland, which on fine needle aspiration cytology was diagnosed as a follicular neoplasm. Treatment was planned for the thyroid gland, the patient receiving chemotherapy including sorafenib. Conclusions: The present case emphasizes that although they are uncommon, dural metastasis can be mistaken for meningiomas. Confirmation of diagnosis as meningioma should be established only after the histopathological analysis. Thyroid follicular carcinoma should be included in the differential diagnosis in cases of extrinsic tumoral lesions.

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