[Mitoxantrone chemoprophylaxis for multirecurrent multifocal superficial bladder tumours: results of a phase 2 controlled study].

Twenty-three patients with multifocal superficial bladder cancer (stage Ta - T1) unresponsive to at least 3 different intravesical agents, were enrolled in a phase II study in order to evaluate the prophylactic effects of intravesical Mitoxantrone (20 mg) after complete endoscopic resection (TUR) of any papillary tumor. The median follow-up was 6 months; 19 patients (82%) experienced superficial tumor recurrence, 1 patient (4%) progression to muscle invasion and 3 (13%) were disease-free, respectively. Six patients (26%) experienced local side-effects. The progression rate is acceptable; the side effects are at least similar to those available in the literature, but in our experience, Mitoxantrone has no prophylactic effects against superficial bladder cancer unresponsive to previous treatment.