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Oligodendroglioma, IDH-mutant and 1p/19q codeleted (microscopy)

(A) Hematoxylin and eosin (H & E, 400X) stain of oligodendroglioma exhibiting isomorphic round nuclei surrounded by clear cytoplasm (400X). (B) Positive immunohistochemical stain for mutant IDH1-R132H protein. (C) Retained nuclear expression of ATRX. (Contributed by: Dr. Lawrence Kenyon.)

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  • Neurofibromatosis