KEYMAKER-U04 Substudy 04D: A Clinical Study of New Treatments Given With Enfortumab Vedotin and Pembrolizumab in People With Urothelial Cancer (MK-3475-04D/KEYMAKER-U04)

Open to people ages 18 years and up

The main inclusion criteria include but are not limited to the following:

• Has histologically documented urothelial carcinoma (UC) that is locally advanced and unresectable or metastatic
• Must provide a newly obtained or archival tumor tissue sample (core or excisional biopsy)
• Must not have received prior systemic therapy for locally advanced or metastatic UC
• If infected with Human Immunodeficiency Virus (HIV), has well controlled HIV on antiretroviral therapy
• If positive for hepatitis B surface antigen, has received hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and has undetectable HBV viral load before randomization
• If participant has a history of hepatitis C virus (HCV), has undetectable HCV viral load before randomization

The main exclusion criteria include but are not limited to the following:

• Has history of documented severe dry eye syndrome, severe Meibomian gland disease and/or blepharitis, or corneal disease that prevents/delays corneal healing
• Has active keratitis or corneal ulcerations
• Has active inflammatory bowel disease requiring immunosuppressive medication, or previous history of inflammatory bowel disease (eg, Crohn's disease, ulcerative colitis, or chronic diarrhea)
• Has uncontrolled, significant cardiovascular disease or cerebrovascular disease within the 6 months preceding study intervention
• Has a history of uncontrolled diabetes
• Has pleural effusion, ascites, and/or pericardial effusion that are symptomatic or require repeated drainage
• Has active autoimmune disease that has required systemic treatment in the past 2 years
• Has known additional malignancy that is progressing or has required active treatment within the past 2 years
• Has known active central nervous system metastases and/or carcinomatous meningitis
• Has a history of (noninfectious) pneumonitis/interstitial lung disease that required steroids, or has current pneumonitis/interstitial lung disease
• Has an active infection requiring systemic therapy
• If infected with HIV, has a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease
• Has concurrent active HBV and HCV infection
• Has a history of stem cell/solid organ transplant