Representative photographs of SATB1 expression in samples of nasopharyngeal carcinoma (NPC) and non-cancerous nasopharyngeal epithelial hyperplasia (NEH) were detected by immunohistochemistry. The immunohistochemical PV9000 method was used to detect SATB1 protein expression in clinical samples. Non-immune IgG was used as a negative control. The expression and location of SATB1 in cells was colorized with DAB and counterstained with hematoxylin. (A): IRS <6.0 in NPC. (B) &(C): IRS >6.0 in NPC. (D): IRS <6.0 in NEH. (E): IRS >6.0 in NEH. (F): IgG control. Original magnification, 400×. Scale bars = 50 μM.