We observed that rs11081899-A, located in the 5'-UTR of the ZNF24 gene, was significantly correlated with a higher risk of severe mucositis (OR = 14.631, 95% CI = 2.61-105.46, <i>p</i> = 1.2 × 10<sup>-4</sup>), and positively associated with <i>ZNF24</i> mRNA expression (<i>p</i> = 4.1 × 10<sup>-6</sup>) from GTEx dataset.