Recent studies have shown that the occurrence and progression of bladder cancer are closely related to alterations to certain signalling pathways, such as abnormalities in the expression patterns of epidermal growth factors, including domain‐7 (EGFL7), E‐cadherin proteins, and in the PI3K‐Akt‐mTOR signalling pathway 4, 5, 6. The gene discussed is CDH1; the disease is urinary bladder cancer.