EBV-positive hemophagocytic lymphohistiocytosis in a lymph node: (a) Diffuse lymphohistiocytic infiltrate with hemophagocytosis (H&E ×300); (b–e) Atypical lymphoid cells are positive for CD3 (b, ×400), CD8 (c, ×400), EBV-encoded small RNA (EBER) (d, ×200) and LMP1 (e, ×400).