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Washington University Experience | NEOPLASMS (GLIAL) | Oligodendroglioma - IDH1 mutant, del 1p19q - Grade 2 | 17C Oligodendroglioma, WHO II (Case 17) IDH1 1.jpg
IDH1-R132H mutation is present by IHC. ---- Not shown: Rare tumor nuclei are positive for p53. ATRX is retained. ---- FISH showed co-deletion of 1p and 19q.