Notably, basal cell carcinoma, cytoskeleton in muscle cells, ECM-receptor interaction, and small cell lung cancer were significantly activated in the COL7A1-H group (Figure 6B), suggesting that high COL7A1 expression might affect the formation and invasion of lung cancer cells in patients by activating the BM-related pathways. Here, COL7A1 is linked to small cell lung carcinoma.