NUDT5 and esophageal squamous cell carcinoma: Elevated NUDT5 level has been reported as a poor prognostic marker of breast cancer (Tong et al., 2021), non-small cell lung cancer (Li et al., 2021), esophageal squamous cell carcinoma (Wang et al., 2020), and clear cell renal cell carcinoma (Wang et al., 2017).