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Washington University Experience | NEOPLASMS (GLIAL) | Glioblastoma, microscopic findings | 6F GBM, endothelial proliferation (Case 6F) Ki67 1.jpg
It may be difficult to tell if the proliferative marker Ki67 is present in cellular tumor cells or if they originate from adjacent vasculature, but in this case the bulk of the proliferation is ongoing in the vascular channels. (Ki67 IHC)