On the other hand, the abnormal expression of the MUC6 gene, usually associated with increased tumor cell mobility, has been found in many malignant tumors, such as gastric cancer (Taniyama and Taniyama, 2017), duodenal cancer (Toba et al., 2018), breast cancer (Rakha et al., 2005), pancreatic cancer (Ohya et al., 2017), endometrial cancer (Hodgson et al., 2019), CRC (Tsai et al., 2015), and lung cancer (Duruisseaux et al., 2017). The gene discussed is MUC6; the disease is gastric cancer.