Our results show that there was no difference between the groups with and without CM addition; the number of positive cells was 94.62 ± 6.73%, 97.51 ± 6.75% and 95.28 ± 5.46% for the control group, NPC-CM and GPC-CM, respectively (Figure 3b,c). Here, GYPC is linked to nasopharyngeal carcinoma.