Consistently, the tissues of ninety-seven patients with NPC and 58 chronic nasopharyngitis patients were applied in the immunohistochemistry assay and it revealed that the positive rate of SDF2L1 in NPC tissues was 2.1% (2/97), which was significantly lower than in chronic nasopharyngitis tissues (50% (29/58)), with all p < 0.05 (Table 2 and Figure 1(b)). This evidence concerns the gene SDF2L1 and nasopharyngitis.