Figure 2.

A high expression level of PGC1α is associated with poor overall survival in nasopharyngeal carcinoma (NPC) patients after radiation therapy. A and B, Representative immunohistochemical (IHC) staining (A) and IHC score (B) of PGC1α in nasopharyngeal inflammation and NPC from a tissue microarray of nasopharyngeal patients (magnification 400×). C, Representative IHC staining of PGC1α expression of nasopharyngeal squamous cell carcinoma patients after radiation therapy from a tissue microarray. D, Overall survival rates of nasopharyngeal squamous cell carcinoma patients after radiation therapy with low (n = 28, survival rate > 50%) or high (n = 20, median survival time = 60 mo) expression levels of PGC1α estimated with the Kaplan‐Meier method by log‐rank test (P = 0.0014). NP, Nasopharyngeal inflammation