Figure 3.

Immunohistochemical analysis of the intranasal mass showed tumor cells were diffusely positive for CD3 (A), CD20 (B), CD56 (C), granzyme B (D) and TIA-1(E). (F) Tumor cells were also positive for Epstein-Barr virus small-encoded RNA (EBERs) by in situ hybridization (A-E, immunohistochemical staining with original magnification ×400; F, in situ hybridization for EBERs with original magnification ×400).