In the last ten years (1983–1993) we treated 18 patients, 17 men and 1 woman, less than 40 years old, with bladder tumour: nine were 15 to 30 years old. The mean follow-up is 40 months. All the patients are living. Of the 18, 2 (more than 30 years old) have had resectable recurrences, in one (27 years old), cystectomy and continent urinary diversion was performed for invasive disease. We think that all patients regardless of age, should be treated as aggressively as necessary on the basis of the stage and grade of the tumour.