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Washington University Experience | NEOPLASMS (GLIAL) | Oligodendroglioma - IDH1 mutant, del 1p19q - Grade 2 | 9B1 Oligodendroglioma Grade 2 (Case 9) A8 IDH1 WM
9B1,2 The tumor is strongly and diffusely positive for mutant IDH1 (R132H), compare with H&E 9A1.