Solitary Intracranial Metastasis of FollicularCarcinoma of the Thyroid Gland ClinicallyMimicking a Meningioma

Authors: J. Ehrmann;  M. Dušková;  J. Macháč 1;  V. Benýšek 2;  J. Hobza 3;  Z. Kolář
Authors‘ workplace: Department of Pathology & Laboratory of Molecular Pathology Faculty of Medicine, Palacký University, Olomouc 1Department of Neurosurgery Faculty of Medicine, Palacký University, Olomouc 2Clinic of Radiology Faculty of Medicine, Palacký University, Olomouc
Published in: Čes.-slov. Patol., , 2004, No. 2, p. 68-71


We describe a rare case of solitary metastasis of follicular carcinoma of the thyroid gland into thepetroclival region in a 58-year-old woman. The metastasis was the first and only manifestation ofthe disease. The histology of the tumor, differential diagnosis and clinical course are discussed. Ina few similar cases described so far the tumor was always a well or moderately differentiatedfollicular carcinoma located in the petroclival region. As in this presentation, these cases alsoclinically mimic a meningioma. The differential diagnosis includes adenoma of the thyroid glandand thyroid gland dystopia. We demonstrated the primary focus of carcinoma within the thyroidafter its detailed examination initiated by our finding. The clinical outcome of such rare cases isusually excellent, much better than in metastases of papillary carcinoma into the brain.

Key words:
intracranial metastasis - follicular carcinoma - thyroid gland - meningioma

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