Intraparenchymal meningioma in a child. Case report and review of the literature.

The authors reported a rare case of temporal intraparenchymal meningioma without dural attachment. A 14-year-old boy presented with a 4-month history of generalized tonic-clonic seizures. Neurological examination showed no abnormality. Magnetic resonance (MR) imaging revealed an anteromedial temporal mass, which appeared to be totally intraaxial and caused peritumoral white matter edema. The tumor was hypointense on T1-weighted and hyperintense on T2-weighted MR images, and enhanced heterogeneously after Gd-diethylenetriamine pentaacetic acid administration. Gross-total excision of the tumor was accomplished. Histopathological examinations indicated that the lesion was a meningioma. The outcome was favorable. The patient has returned to baseline activities without sequelae or epilepsy. Magnetic resonance images revealed no residual tumor during a 3-year follow-up period. In this report, the authors review the literature and discuss intraparenchymal meningiomas in the differential diagnosis of intraaxial lesions.