(a)
(b)
(c)
(d)
Figure 3: Histopathological findings of the monomorphic posttransplant lymphoproliferative disorder; diffuse large B-cell lymphoma of the right testis. Immunophenotyping, via immunohistochemistry, revealed neoplastic cells positive for Bcl-2 (a), Bcl-6 (b), Ki-67 (proliferation index > 90%) (c), and CD20 (d). Magnification for all panels: 40x.