Primary cutaneous CD4⁺ small/medium-sized pleomorphic T-cell lymphoma. (A) Presentation with a solitary tumor on the scalp. (B) Diffuse dermal infiltrate mainly composed of small pleomorphic T cells with few scattered blasts cells (H&E staining; original magnification, × 750). Image acquisition was performed as described for Figure 1B. An HC FLUOTAR 63×/0.90 objective lens was used.