These mice specifically express a human-derived oncogene, 19th-exon-deleted EGFR, in alveolar epithelial cells in the presence of doxycycline (DOX), leading to lung adenocarcinoma.37 During the long time windows from the initiation of carcinoma to the development of adenoma,35,36 we performed repeated transplantation of UC-MSCs and characterized the dynamics through live imaging and pathological analysis. The gene discussed is EGFR; the disease is lung adenocarcinoma.