Survival analysis showed that higher expression of CALHM2 (P <0.001), CCL21 (P =0.012), FCGR2C (P <0.001), and SLC8A1 (P =0.003) was associated with poorer prognosis in patients with NPC (Fig. 3D). This evidence concerns the gene SLC8A1 and nasopharyngeal carcinoma.