Fig. 3

Immunohistochemical expression of Signal transducer and activator of transcription-3 (STAT-3); (a) High nuclear STAT-3 expression in DLBCL stage IV × 400 (b) High nuclear STAT-3 expression in DLBCL stage III × 400 (c) negative nuclear STAT-3 expression in DLBCL stage I × 400 (d) positive nuclear STAT-3 expression in sections from invasive duct carcinoma of the breast as appositive control of the marker × 400 (e) Negative control by replacement of the primary anti- STAT-3 antibody by phosphate buffered saline × 400