GALNT14 and breast carcinoma: Additionally, GALNT14 genotypes were associated with the expression levels of their protein product, GalNac-T14, which had been shown to mediate the oncogenesis and/or treatment responses in several other cancers, including cholangiocarcinoma [30], colon cancer [31], esophageal cancer [32], neuroblastoma [33], lung cancer [34], and breast cancer [35].