CDH1 and neoplasm: Principal considerations including cancer cell stemness, cell adhesion, cell proliferation, and DNA repair could contribute to drug chemoresistance during tumor treatment.[17] The chemoresistance‐related markers, such as E‐cadherin, hypoxia, and cancer cell stemness were analyzed using immunofluorescence and qPCR further to explore the mechanism of drug resistance in MCF‐7 cells.