Figure 1.

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.