CA9 and bladder transitional cell carcinoma: This study retrospectively analyzed the clinical data of 194 patients diagnosed and treated in our hospital, and found that the positive rate of CA-IX in bladder urothelial carcinoma was 68.1% (132/194), and the positive rate in adjacent tissues was 44.3% (86/194), the positive rate of normal tissue was 27.3% (53/194).