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Washington University Experience | NEOPLASMS (MESENCHYMAL, NON-MENINGOTHELIAL) | Solitary Fibrous Tumor (SFT) | 9E Hemangiopericytoma (HAP, Original Cervicomedullary site, Case 9) Factor 13a 1.jpg
9E-G Tumor cell cytoplasm stains strongly for Factor XIIIa (9E), CD99 (9F) and bcl-2 (9G)