C4A and neoplasm: Except for fibroblasts, a total of 937 endothelial cells were also obtained, which were subclustered into five subsets (Figure 3F; Supplementary Figure S3D), including extra-alveolar capillary ECs (Endo-C1; EDN1+), tumor ECs (Endo-C3; INSR+), and other ECs (Endo-C2, ICAM1+; Endo-C4, MAP1B+; Endo-C5, CXCR4+).