Figure 1.

Phosphorylated STAT3 (pSTAT3) expression in adult T‐cell leukemia/lymphoma (ATLL). Left panel, acute type sample obtained from a lymph node lesion in a 72‐y‐old man. Almost all of the tumor cells showed nuclear expression of pSTAT3. Middle panel, in contrast, the lymphoma type sample obtained from a lymph node lesion in a 66‐y‐old man showed very few pSTAT3‐positive cells. Right panel, smoldering type sample obtained from a skin lesion in a 56‐y‐old woman. Infiltrating ATLL cells in the dermis (left side) were positive for pSTAT3 as well as normal epithelial cells (right side). Original magnifications of all images, ×400