COL5A1 and lung adenocarcinoma: Overexpression of COL5A1 may promote metastasis of lung adenocarcinoma (Liu et al., 2018) and the progression of muscle-invasive bladder cancer (Ewald et al., 2013) and may increase the risk of hematogenous and lymphatic metastasis in serous ovarian cancer (Yue et al., 2019).