Peripheral T-cell lymphoma, unspecified (submental lymph node biopsy). A, The H&E section demonstrates expansion of the interfollicular T-cells (low magnification); B. The infiltrating T-cells show atypia and clear cytoplasm (high magnification); C, Paraffin immunoperoxidase staining reveals the lymphoma cells are positive for CD4; D. Reactive CD8-positive T-cells are also present.
Gonzalez-Cuyar et al. Diagnostic Pathology 2008 3:22 doi:10.1186/1746-1596-3-22