Only one study mentioned that IQUB expression was increased in gastric cancer by transcriptome sequencing.5 In our study, we noticed that the expression of IQUB in breast cancer tissues was not only significantly increased, but also positively correlated with the pathological differentiation of breast cancer, suggesting that IQUB may have a bearing on the malignant progression and prognosis of breast cancer. Here, IQUB is linked to gastric cancer.