Therefore, we confirmed tumour subtypes by staining for surfactant protein C (SP-C) and TTF1 to verify LUAD histology and for glucose transporter 1 (GLUT1) and cytokeratin 5 (CK5) to verify LUSC histology, as previously described11 (Extended Data Fig. 1b–d). The gene discussed is SFTPC; the disease is neoplasm.