Dysregulation of MAN1A1 has been shown to be associated with the tumor progression in various types of cancers including breast cancer, ovarian cancer, cholangiocarcinoma, and liver cancer (Legler et al., 2018; Phoomak et al., 2018; Hamester et al., 2019; Park et al., 2020). This evidence concerns the gene MAN1A1 and breast cancer.