Primary testicular diffuse large B-cell lymphoma with gonadal vein tumor thrombus: A case report and review of the literature

Figure 2 Pathological findings of left testis tumor. A: Orchiectomy specimen showing an enlarged testis and spermatic cord tumor; B: Lymphatic cellular infiltration with monomorphic, medium-to-large round cells and nuclear pleomorphism, H&E (× 40). C-G: Immunohistochemistry findings. C: MUM1 (× 20, weak positive); D: CD10 (× 20, negative); E: BCL6 (× 20, negative); F: CD20 (× 20, strong positive); G: Ki-67 (× 20, approximately 80% positive, high proliferation rate).