A Study to Evaluate Efficacy and Safety of Hydeal Cyst® Intravesical Instillations in Patients Treated With Intravesical Chemotherapy or Immunotherapy in Non-muscle Invasive Bladder Cancer

"BCG or MMC will be started within 1-2 weeks from randomization (within 4-6 weeks after TURB).~BCG or MMC will be administered once a week by intravesical instillation: BCG will be abministered for 6 weeks and MMC for 8 weeks. (induction cycles) Before instillations a physical examination will be performed and symptoms evaluated: changes from baseline and abnormalities will be recorded in patient notes.~IPSS questionnaire and QoL questionaire will be administered to the patient at week 1, 4 and 6/8 (6 for BCG and 8 for MMC) of treatment.~48 hours after post BCG or MMC intravesical instillation, patients of Arm A will undergo Hydeal Cyst intravesical instillation.~BCG patiens will received 6 Hydeal Cyst intravesical instillation; MMC patiens will received 8 Hydeal Cyst intravesical instillation."