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Washington University Experience | NEOPLASMS (GLIAL) | Gliosarcoma | 18B Gliosarcoma (Case 18) GFAP 10X
18B A glial fibrillary acidic protein immunohistochemical stain shows the biphasic histology by forming a contrast between the glioblastoma multiforme component that is reactive for GFAP and the perivascular sarcomatous component that is non-reactive.