AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Superficial TCC: Any G3 or any T1 and/or CIS
* Multifocal (\>1) Ta lesions
* Multiple recurrences (\>2) of Ta lesions in the last 24 months
* Complete tumor eradication must be confirmed
* WHO performance status 0-2 (Appendix V)
* Life expectancy of more than 24 months
* Patients willing to sign informed consent
Exclusion Criteria:
* Bladder tumors other than TCC
* Coexistence of another primary malignant tumor other than BCC of the skin
* TCC of the bladder involving the urethra or upper urinary tract
* Previous history of TCC stage T2 or higher
* Clinical presence or previous history of regional spreading or distant metastases
* Intravesical MMC treatments during the last 12 months
* Previous intravesical BCG therapy (Any intravesical BCG therapy in the last 24 months, or More than 6 BCG intravesical instillations in the last 48 months.
* Previous pelvic radiotherapy or systemic chemotherapy
* Partial cystectomy
* Diverticle of bladder larger than 1cm in diameter
* Residual urine \> 100cc measured by uroflowmetry
* Bladder volume \< 150cc measured by ultrasound
* Urinary incontinence (more than one wet pad a day)
* Urethral stricture impeding 20F catheterization
* Urethral bleeding or persistent hematuria
* Active intractable or uncontrollable UTI
* Active tuberculosis or BCG infection
* Patients who experienced BCG life threatening sepsis
* Known allergy to MMC or BCG
* Known impaired immune response, positive HIV serology, patients receiving syste…