[Intraventricular neurocytoma. Report of 2 cases and analysis of the therapeutic possibilities].

Intraventricular or central neurocytoma is a recently described unusual benign cerebral tumor. Common features include: predominant occurrence in young adults, septum pellucidum and fornix localization, and signs of intracranial hypertension due to obstructive hydrocephalus. Histopathologically, this tumor is characterized by a uniform neoplastic cell population with features of neuronal differentiation. Radiologic findings such as calcification, well-circumscribed tumor mass and confinement to the lateral and third ventricles are common. An anterior transcallosal neurosurgical approach yielded good outcomes. Radiotherapy should be considered for residual and recurrent neurocytomas. However, the radiation sensitivity of intraventricular neurocytoma has not been established and further studies are required to determine susceptibility to irradiation.