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Washington University Experience | NEOPLASMS (GLIAL) | Oligodendroglioma - IDH1 mutant, del 1p19q - Grade 3 | 22A2 Oligodendroglioma Grade 2 (Case 22) H&E 20X 3
H&E stained sections show a markedly cellular, diffusely infiltrative oligodendroglial glioma. There are foci of marked hypercellularity and greater pleomorphism. In the hypercellular areas, there is rare incipient microvascular proliferation. Mitoses are brisk, up to 7/10HPF. There is no definitive necrosis.