SCGB1A1 and neoplasm: It is known that both club cells and BASCs can give rise to alveolar cells.[3, 40, 41] Research demonstrated that AT2 cells might not be the major contributor of the regeneration of lung epithelium after bleomycin injury, while CCSP‐expressing cells may play a significant role in this process.[3, 42, 43, 44] These data suggest that BASCs possess a potent potential for alveolar cell differentiation and could serve as cells‐of‐origin for diverse tumor types.