Results of immunostaining for the NKRs in extranodal lymphomas.

(A) (B) Nasal NK cell lymphoma (case 2): nasal biopsy. Most pleomorphic small-to- medium-sized cells are (A) CD94⁺ and (B) p140+. (C) Hepatosplenic γ/δ T-cell lymphoma (case 5): splenectomy specimen. Most of the medium-sized and large transformed cells are p58.2+. (D) Preserved intestinal mucosa adjacent to a lymphomatous infiltrate. Scattered lamina propria lymphocytes are p50.3+.