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Washington University Experience | NEOPLASMS (MESENCHYMAL, NON-MENINGOTHELIAL) | Solitary Fibrous Tumor (SFT) | 12F Hemangiopericytoma, Grade III (Case 12) MIB

Nuclear reactivity for proliferation marker Ki-67 (MIB-1 antibody) is uniformly distributed within viable tumor tissue, appearing in 6.1% of tumor cells. ---- No tumor cell reactivity is observed for epithelial membrane antigen or progesterone receptor. This histological/histochemical/immunohistochemical pattern is consistent with Solitary Fibrous Tumor, WHO Grade 3.

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