CD150 and SH2D1A expression in reactive tonsils and primary lymphoma cells. Immunohistochemical staining of CD150 (left panels: A, C, E, G) and SH2D1A (right panels: B, D, F, H,) on reactive tonsils (A, B), lymph node sections from patients with GC-DLBCL (C, D), ABC-DLBCL (E, F), and HD (G, H). CD150 and SH2D1A were coexpressed in malignant cells in ABC-DLBCL and HD. Original magnifications: 100 × (A, B, H), 400 × (C-F, and insets in A and B), 1000 × (G and H inset). H inset was magnified with Photoshop software (Adobe Systems, San Jose, CA). DAB staining shows specific reactions in brown.