MET and metastatic neoplasm: This concept needs to be verified in atrial cells, but would be consistent both with the constitutive activation of c-met reported in certain tumor cells (Rusciano et al. 1996, Dai and Siemann 2012) and with the context-dependent protective versus adverse duality of c-met function in cardiac and metastatic diseases (Leo et al. 2011, Centuori and Bauman 2022, Jin et al. 2024).