INSL5 and nasopharyngeal carcinoma: Combining all the samples, we found that this cut‐off value could differentiate NPC patients from normal controls with a sensitivity of 89.6% and a specificity of 77.7% (Fig 1G), and the INSL5 level demonstrated impressive sensitivity and specificity for NPC diagnosis (AUC 0.914, 95% CI: 0.897–0.931) (Fig 1H), which is comparable to VCA‐IgA for NPC diagnosis.