[Diagnosis of bladder tumors].

Prompt diagnosis of bladder cancer is essential to improve the management of this disease. Hematuria and lower urinary tract symptoms must draw attention to bladder difficulties. The diagnosis is based on cystoscopy and biopsy of any lesions. Once the diagnosis has been established, the tumour should be staged using the TNM system before treatment. Research efforts are continuing to identify biological markers sensitive and specific enough to predict the diagnosis and behavior of this disease accurately.