Central nervous system neurocytoma is a rare benign tumor of neuronal origin. Because of some clinical and radiological findings CNS neurocytomas were confused with other intraventricular lesions (ependymomas, choroid plexus papilloma, oligodendrogliomas, subependymal astrocytomas). Pathological diagnosis improved with immunohistochemical and electron microscopic studies. We present three cases of intraventricular neurocytomas confirmed by immunohistochemical studies. According to the literature clinical signs, radiological features, surgical and pathological findings are discussed.