A Study of Intravesical Enfortumab Vedotin For Treatment of Patients With Non-muscle Invasive Bladder Cancer (NMIBC)
This study will test a drug called enfortumab vedotin in participants with a type of bladder cancer called non-muscle invasive bladder cancer (NMIBC). This study will also evaluate what the side effects are and if the drug works to treat NMIBC. A side effect is anything a drug does to your body besides treating your disease. In this study enfortumab vedotin will be put into the bladder using a catheter. A catheter is a thin tube that can be put into your bladder.
• Histologically confirmed, non-muscle invasive urothelial carcinoma with carcinoma in situ (CIS) (with or without papillary disease)
• Predominant histologic component (\>50 percent) must be urothelial (transitional cell) carcinoma
• Participants must have high-risk Bacillus Calmette-Guerin (BCG) - unresponsive disease, defined as (where adequate BCG therapy is defined as one of the following: 5 of 6 doses of an initial induction course + at least 2 of 3 doses maintenance therapy or 5 of 6 doses of an initial induction course + at least 2 of 6 doses of a second induction course):
‣ Persistent or recurrent CIS alone or with recurrent Ta/T1 (noninvasive papillary disease/tumor invades the subepithelial connective tissue) disease within 12 months of completion of adequate BCG therapy.
⁃ Recurrent high-grade Ta/T1 disease within 6 months of completion of adequate BCG therapy, or
⁃ T1 high-grade disease at the first evaluation following an induction BCG course (at least 5 or 6 doses)
• Participant must be ineligible for or refusing a radical cystectomy
• All visible papillary Ta/T1 tumors must be completely resected within 60 days prior to enrollment.
• Eastern Cooperative Oncology Group Performance Status score of 0, 1, or 2.