Figure 1.
![EMP with concurrent EBV infection (patient 8). (A,C,E) Tonsillar areas with infiltration by a plasmacytoma with sheets of plasma cells with monotypic expression of λ (A, om ×25; C, om ×200) and negativity for κ (E, om ×200). (B) These areas are EBV/EBER negative (om ×25). (B,D,F) Reactive areas contain EBV+ B cells (EBER; B, om ×25; and inset B′, om ×400) and polyclonal plasma cells (D [λ], om ×400; F [κ], om ×400).](https://ash.silverchair-cdn.com/ash/content_public/journal/bloodadvances/9/15/10.1182_bloodadvances.2025016596/1/blooda_adv-2025-016596-gr1.jpeg?Expires=1757126179&Signature=BZhI3klIg1HbI7T2W4wVSPnoNM6BEwtMU6c8Eu7i7T6qdXjLkqujG8dAPjEw4JMz3TIrEISlxW7MrADv5bsdYrhF-s9yK1gV~G0SmQqRzx6ziLRJBJSHJfsNuUbHOzIp-oqYD-kMj3jQQ1KZ-58l1edLRiFKnQabhEm5qNTC5piwrVhiYUTjhU1vDgIrlMVeRSriuFzkf~BE8liQ-s-tmpnUzli7iu9ze~7Y7eRqrQoYt~X3nojfhMGjH2a9uFuuSxRD3tsAXyhMP4ktOueNMDNglyqsTFN3t2ZfxbhyzI3eB31drTMCMCxD0zieV17TILKaWv78LPognlDvjq6GEw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
EMP with concurrent EBV infection (patient 8). (A,C,E) Tonsillar areas with infiltration by a plasmacytoma with sheets of plasma cells with monotypic expression of λ (A, om ×25; C, om ×200) and negativity for κ (E, om ×200). (B) These areas are EBV/EBER negative (om ×25). (B,D,F) Reactive areas contain EBV+ B cells (EBER; B, om ×25; and inset B′, om ×400) and polyclonal plasma cells (D [λ], om ×400; F [κ], om ×400).
