Parasagittal solitary fibrous tumor of the meninges. Case report and review of the literature

The clinical, radiologic and pathologic features of a case of parasagittal solitary fibrous tumor of the meninges are reported. The patient was a 44 y ear-old male who presented with a complex partial seizure and a history of headaches and confusion. Radiological studies showed a large extra-axial du ral-based mass in the right parietal region, predominantly isointense with gray matter and hypointense with respect to white matter on T1-weighted ima ges, and hypointense with respect to gray matter on T2-weighted images. At surgery, the mass was very vascular, quite firm and very adherent to the co nvexity. Histologically the tumor was composed of spindle-shaped cells grow ing in fascicles within a collagenous matrix. Solitary fibrous tumor of the meninges is a newly described entity, which should be kept in mind in the clinical and radiological differential diagnosis of extra-axial brain tumor s.