This study will investigate the preliminary activity of Oncofid-P-B administered by intravescical route at the Recommended Dose of 600 mg, once a week, for six weeks evaluating the ablative activity on a papillary marker tumor in patients suffering from non-muscle invasive cancer of the bladder. When a patient will present a Complete Response at the end of the six weekly administration of Oncofid-P-B , he/she can enter a second phase of the study defined maintenance phase. During this phase, the patients will be treated with the study drug administered by intravesical infusion once a month for 2 cycles of treatment with the duration of 6 months separated by a period during which study drug will not be administered, due to the necessity to perform histological evaluation of efficacy. This scheme will follow a clinical usual approach for the maintenance treatment of patients suffering from non-muscle invasive cancer of the bladder.~Complete Response is defined as follows: complete disappearance of the marker lesion, as confirmed by negative post-treatment cystoscopy including a biopsy at the marker lesion site and the absence of new tumors at other site and negative cytology.
The purpose of the study is to assess, at control visit (V8), the ablative activity of intravesical administration of Oncofid-P-B on a papillary marker tumor on patients suffering from multiple primary and recurrent Ta G1-G2 papillary cancer of the bladder after 6 weeks of weekly study drug administration, through number and percentage of patients with Complete Response.