Primary Oligodendroglioma of the Lateral Ventricle: Computed Tomography and Magnetic Resonance Imaging Findings

primary intracranial gliomas (1). They mainly occur in the cerebral hemispheres. Intraventricular location as a primary site is rare (1). Although the histologic features of intraventricular and parenchymal oligodendrogliomas are similar, their imaging characteristics and presenting symptoms are quite different. In this paper we present computed tomography (CT) and magnetic resonance imaging (MRI) features of a purely intraventricular oligodendroglioma. Case Report A 54-year-old male patient presented with a two-month history of amnesia and seizures. Physical and neurological examinations were normal. Routine laboratory investigations were unremarkable. CT showed a partially calcified right ventricular mass, which was conforming to the shape of the ventricle. The mass was rather heterogeneous with cystic areas isodense with the cerebrospinal fluid and solid portions isodense with gray matter (Fig 1). The right lateral ventricle was dilated. MRI revealed a lobulated mass in the right lateral ventricle adjacent to the foramen of Monro and septum pellucidum, with displacement of the midline structures. The right lateral ventricle was dilated. There was no peritumoral edema. The cystic parts of the lesion 39 etin Atasoy, A.Tuba Karaglle, lhan Erden, Serdar Akyar