The improvement of the endoscopic strumentation and technique has permitted a large diffusion of the transurethral resection of the vesical (TURV) for malignant neoplasms. We report the complications of this method described in literature and a review of the cases observed at the Urological Division of Niguarda Hospital in Milan from January 1985 to December 1989 has presented. The adequate treatment of the complications permits to minimize the damage for the patient.