S100A8 and nasopharyngeal carcinoma: The statistically analyzed results showed that the positive staining area percentage (PSAP) of S100A8 and S100A9 in 49 cases of NPC tissues was 11.74 (8.08, 22.91) and 14.97 (10.55, 21.40), respectively, which were higher than those of 0.29 (0.07, 1.39) and 3.21(1.98, 3.89) in 20 cases of CP tissues, with the significant differences (z values −6.34 and −5.95, P < 0.01, respectively) (Figures 1(b) and 1(d) and Table S1).