Conditions: Urinary Bladder Cancer Bladder Cancer Bladder Neoplasms Bladder Tumors
Allocation: NON_RANDOMIZED | Intervention model: SINGLE_GROUP
Enrollment: 46
Healthy volunteers: no

Brief summary:
The purpose of this study is to evaluate the efficacy and tolerability of Vicinium when administered as a monotherapy intravesical instillation in patients with non-invasive urothelial carcinoma in situ (CIS) who failed previous treatment with Bacille Calmette Guérin (BCG).

Detailed description:
A phase II study was performed to assess the efficacy and tolerability of intravesical Vicinium in patients with urothelial carcinoma in situ of the bladder. Bacillus Calmette-Guérin treatment had previously failed in all patients. A total of 46 patients were treated with Vicinium with half being administered 30mg/dose once per week for 6 weeks (cohort 1) and the other half (cohort 2) the same dose but administered once per week for 12 consecutive weeks. Disease assessments consisting of urine cytology, cystoscopy and, if indicated, biopsy were performed at 3 month intervals. Patients that were disease-free at the assessment time point were allowed to continue treatment in the maintenance phase which consisted of three weekly doses, followed by 9 weeks of no treatment. As long as the patient remained disease-free, treatment continued for a total of one year.

Arms:
arm 1: Induction Phase is a single intravesical dose of Vicinium at 30 mg in 40 mL PBS once per week for 6 weeks. If free of disease at 12 weeks after the first instillation, the subject enters Maintenance dosing in which 30 mg of Vicinium is administered once per week for 3 weeks followed by 9 weeks of no therapy.

If the subject had histologically confirmed disease that is stage \<T2, they repeat the Induction phase dosing. If the subject is free of disease, the subject enters the maintenance dosing phase of every 12 weeks (3 weeks of therapy followed by 9 weeks of no therapy until disease recurrence is confirmed by positive biopsy or up to a maximum of Week 51 (end-of-study \[EOS\]). arm 2: Induction Phase is a single intravesical dose of Vicinium at 30 mg in 40 mL PBS once per week for 12 weeks followed by 1 week of no therapy.

If 13 weeks after the first instillation of Vicinium the subject is free of disease, they have a break from therapy before entering Maintenance dosing in which 30 mg of Vicinium is administered once weekly for 3 weeks followed by 9 weeks of no therapy. If the subject is free of disease, additional maintenance cycle(s) are repeated every 12 weeks (3 weeks of therapy followed by 9 weeks of no therapy until disease recurrence is confirmed by positive biopsy or up to a maximum of Week 57 (EOS).

Interventions: intervention 1: Vicinium
Intervention descriptions: intervention 1: Intravesical administration of Vicinium

Protocol document: