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Washington University Experience | NEOPLASMS (MESENCHYMAL, NON-MENINGOTHELIAL) | Chordoma | 2D1 Chordoma, pelvic (Case 2) 1 S100 whole mount
2D1,2 Cytoplasmic reactivity for S100 is modest in some regions of the tumor tissue, and not detectable in others. (S100 IHC)
