Recommended Markers for Tumors With Plasmacytoid Morphology (a) Antibodies
UCaPl PrBlsrc Plasma Breast Stomach CK7 + - + + + or - CK20 + or - - + - + or - GATA3 + ND ND + (b) - CD138 + + - ND ND LCA - + - - - Synap - - - - Chrom - - S100 - - - + Desmin - - - Antibodies Para/NEC Mel-s RMS CK7 - or + - - CK20 - - - GATA3 - - ND CD138 - - - LCA - - - Synap + - + Chrom + - S100 + (c) + - Desmin - - + Abbreviations: Breast, breast adenocarcinoma; Mel/s, malignant melanoma of skin origin; Para/NEC, paraganglioma and neuroendocrine carcinoma; Plasma, plasmacytoma; PrBlsrc, primary bladder adenocarcinoma, signet ring cell type; RMS, rhabdomyosarcoma; Stomach, gastric adenocarcinoma;
UCaPl, invasive urothelial carcinoma, plasmacytoid variant.