Study of Vicinium for Treating Patients With Non-Invasive Urothelial Carcinoma In Situ

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.