We finally obtained 16 hub genes associated the staging of bladder cancer, including CDH11, COL3A1, COL6A3, COL5A1, AEBP1, COL1A2, NTM, COL11A1, THBS2, COL8A1, COL1A1, BGN, MMP2, PXDN, THY1, and TGFB1I1. The gene discussed is COL5A1; the disease is urinary bladder cancer.