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Diffuse large B-cell lymphoma with expression of IDO: Diffuse large B-cell lymphoma, not otherwise specified(A–E), ×100; (A): score 0 (<5%), (B): score 1 (5-25%), (C): score 2 (26–50%), (D): score 3 (51-75%), (E): score 4 (>75%)). T-cell/histiocyte–rich large B-cell lymphoma (F): score 2, ×40; Insert: ×400. Primary cutaneous DLBCL, leg type (G): score 4, ×100; Insert: ×400. Epstein-Barr virus (EBV) -positive DLBCL, NOS (H): H&E stain, (I): IDO stain, score 4, (H,I): ×200.
