Oligodendroglioma of the interthalamic : pathomorphology in a french mastiff dog

Abstract

Both animal and human oligodendrogliomas are known to occur predominantly in the white matter of the cerebral hemispheres (Okazaki et at. 1988; Summer eta/. 1994 ). It was reported that some brain tumors, including astrocytoma. ependymoma, and central neurocytoma, can occasionally exhibit a honeycomb like appearance (Hasson et a/. 1982; Uchida et at. 1999). Oligodendrogliomas usually unencapsulated, typical appearance of neoplastic cells, and have clear cytoplasm with halo and round nuclei. The present study examined the pathomorphology of oligodendroglioma which occurred in the interthalamic region of the brain and demonstrated that routine staining and immunohistochemistry are definitive method in identifying this tumor.