Testicular Lymphoma : Ki-67
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
The vast majority of primary testicular lymphomas are diffuse large B-cell type with a non-germinal center B-cell immunophenotype and a high Ki-67 proliferation index (usually > 20%; approaching 100% in this case). The lymphoid cells surround a couple of atrophic seminiferous tubules.