[Intraventricular fibrous tumor: a case report].

Solitary fibrous tumor was first reported in the pleura; however, it has since been reported in many other locations. Solitary fibrous tumors of the central nervous system are uncommon and the intraventricular location is exceptional. To our knowledge, only eight cases of intraventricular solitary fibrous tumor have been reported. We describe a case of intraventricular solitary fibrous tumor.The imaging characteristics of intraventricular solitary fibrous tumors are nonspecific; the differential diagnosis should include other tumors that can affect the ventricular system such as meningioma, high grade glioma, metastasis, subependymoma, choroid plexus papilloma, ependymoma, subependymal giant cell astrocytoma, and neurocytoma. At histological study, immunohistochemical techniques allow solitary fibrous tumor to be differentiated from fibrous meningioma and hemangiopericytoma.