Mixed oligodendroglioma - meningioma: a rare collision tumour

A case of a very rare intra-axial brain tumour, consisting of components - maliganant meniongioma, oligodendroglioma and astrocytoma in a 36-year-old man, is described. A review of literature regarding its pathogenesis is presented and a classification for such tumours is proposed to identify pathologically different subgroups among them as they do not belong to a homogenous variety and comparison of different subgroups in not worthwhile