IL17A and nasopharyngeal carcinoma: This statistically significant pattern was consistently reproduced in the validation cohort, with the NPC group maintaining elevated IL-17A concentrations (median [IQR]: 2.05 [0.8, 5.16]) compared with the PC group (median [IQR]: 0.93 [0.54, 1.52]; p = 0.021) (Figure 1).