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Washington University Experience | NEOPLASMS (HEMATOLYMPHOID) | Rosai-Dorfman Disease | 8D Rosai-Dorfman Dz (Case 8) S100 1.jpg
S100 staining is patchy. (S100 IHC) ---- Ancillary findings (not shown) These same cells are negative for CD1a and factor XIIIa.
