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CASE REPORT
Year : 2011  |  Volume : 3  |  Issue : 1  |  Page : 39-42

Thyroid carcinoma presenting as a dural metastasis mimicking a meningioma: A case report


Department of Medical Oncology, National Institute of Oncology, Rabat, Morocco

Correspondence Address:
El Mehdi Tazi
Department of Medical Oncology, National Institute of Oncology, Rabat
Morocco
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Source of Support: None, Conflict of Interest: None


DOI: 10.4297/najms.2011.339

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Context: Follicular thyroid cancer rarely manifests itself as a distant metastatic lesion. Case Report: We report a case of a 41-year old man presented with a solid mass located in the left temporo-occipital region. The 3D computed tomography showed a large solid mass with high vascularity, skull erosion and supra-infratentorial epidural mass effect. After magnetic resonance imaging (MRI) a suspect diagnosis of meningioma was made. The patient underwent surgery where a soft mass with transverse sinus invasion was encountered; the tumour was successfully resected employing microsurgical techniques. Histological examination revealed a thyroid follicular neoplasm with positive staining for follicular carcinoma in immunohistochemical analysis. Postoperatively levels of thyroid hormones were normal. Treatment was planned for the thyroid gland, patient receiving 6 courses of chemotherapy including paclitaxel. Conclusions: The present case emphasizes that although they are uncommon, dural metastasis can be mistaken for meningiomas. The definitive diagnosis of a 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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