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Primary malignant schwannoma of the Gasserian ganglion. Report of two cases.

The diagnosis, radiographic features, clinical presentation, and treatment of two cases of primary malignant schwannoma of the Gasserian ganglion are discussed. Radiographic differentiation from trigeminal neurinoma is not possible; however, erosion of the foramina favors a diagnosis of malignancy. Radiation therapy was successful in the management of both cases and is recommended for extensive lesions.