1. Further tests determined the lesion was a rare cancerous tumor known as an oligodendroglioma . 2. This type of small tumor, known as oligodendroglioma , responds very well to treatment, 3. Myxoid foci and oligodendroglioma -like cells may also be present, though non-specific. 4. He died at the age of 28 from stage III oligodendroglioma , an inoperable brain cancer. 5. The oligodendrogliomas include low-grade oligodendroglioma , anaplastic oligodendroglioma, and oligoastrocytoma ( mixed glioma ). 6. The oligodendrogliomas include low-grade oligodendroglioma, anaplastic oligodendroglioma , and oligoastrocytoma ( mixed glioma ). 7. Several cases of oligodendroglioma occur in the United States each year, according to the American Medical Association Encylopedia. 8. After a successful resection of the tumor it recurred in September 2013 and was diagnosed as anaplastic oligodendroglioma brain cancer. 9. The American Medical Association Encyclopedia of Medicine says that several hundred cases of oligodendroglioma occur in the United States each year. 10. In March 2012 Trippy was diagnosed with a benign Oligodendroglioma brain tumor after having a seizure at the end of February.