Fig. 3From: Primary small intestinal extranodal NK/T cell lymphoma, nasal type with kidney involvement: a rare case report and literature reviewImmunohistochemical analysis show that tumor cells are positive for CD3 (A), CD56 (B), granzyme B (C), TIA-1 (D), and perforin (E) and negative for CD20 (F). The Ki-67 proliferation index reach up to 90% (Fig. 3G). In situ hybridization for EBER show strong positivity in most of the tumor cells (Fig. 3 H).Back to article page