Intravesical Gemcitabine Instillation Followed by Transurethral Resection for the Treatment of Patients With Superficial Bladder Cancer at Low Risk.

Inclusion Criteria: * Primary solitary bladder tumour not exceeding 2 cm of diameter at sonography and/or at cystoscopy, judged by the investigator not muscle infiltrating and at low risk * Urinary cytology negative for severe dysplasia (G3). * ECOG performance status 0-1 * Absence of anti-coagulant therapy or acetyl-salicylic acid chronic therapy * Absence of other present or past neoplasias except for healed skin basalioma Exclusion Criteria: * Tumours with infiltrative patterns at cystoscopy * Transitional carcinoma of the upper urinary tract and prostatic urethra. * Any previous or concomitant malignancy other than superficial bladder cancer with the exception of cutaneous basalioma and/or cancer of the cervix, adequately treated.