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Washington University Experience | NEOPLASMS - CRANIAL AND PARASPINAL NERVEs | Perineurioma, Intraneural | 3E4 Perineurioma (Case 3) S100 20X 2.jpg
3E4,5 Higher magnification of several other fascicles showing separate cell populations. The perineurioma area stains negatively for S100. (S100 IHC).