oligodendroglial tumor oligodendroglial neoplasm oligodendroglial tumor MEDGEN:233266 Oligodendrogliomas are cerebral tumors that are differentiated from other gliomas on the basis of their unique genetic characteristics and better response to chemotherapy. These tumors are classified according to their grade (low grade oligodendrogliomas: grade II of the WHO classification and anaplastic oligodendrogliomas: grade III of the WHO classification) and according to their pure or mixed histology (oligoastrocytomas). GARD:0013156 NCIT:C6960 MONDO:0018744 Orphanet:46484 UMLS:C1335110 malignant glioma