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Washington University Experience | NEOPLASMS (HEMATOLYMPHOID) | Plasmacytoma | 8C Plasma Cell Neoplasm (Case 8) ISH Kappa
8C,D In situ hybridization showed >99% of the tumor cells are positive for kappa surface light chains (8C) while lambda (8D) only stains focal cells (ratio: 99:1). ---- Diagnosis: Plasma cell neoplasm
