for people ages 18 years and up (full criteria)
at Orange, California and other locations
study started
estimated completion



The purpose of this study was to evaluate the efficacy and safety of pembrolizumab + epacadostat vs pembrolizumab + placebo as a treatment for recurrent or progressive metastatic urothelial carcinoma in patients who have failed a first-line platinum-containing chemotherapy regimen for advanced/metastatic disease.

Official Title

A Phase 3 Randomized, Double-Blind Clinical Study of Pembrolizumab + Epacadostat vs Pembrolizumab + Placebo as a Treatment for Recurrent or Progressive Metastatic Urothelial Carcinoma in Patients Who Have Failed a First-Line Platinum-containing Chemotherapy Regimen for Advanced/Metastatic Disease (KEYNOTE-698/ECHO-303)


UC (Urothelial Cancer) Urothelial carcinoma programmed cell death protein 1 (PD-1) inhibitor indoleamine 2,3-dioxygenase (IDO) inhibitor Carcinoma Carcinoma, Transitional Cell Pembrolizumab Epacadostat Pembrolizumab 200 mg + Epacadostat 100 mg BID


You can join if…

Open to people ages 18 years and up

  • Histologically-confirmed diagnosis of urothelial carcinoma of the renal pelvis, ureter, bladder, or urethra, that is transitional cell, or mixed transitional/non-transitional (predominantly transitional) cell type.
  • Progression or recurrence of urothelial carcinoma following one prior platinum containing chemotherapy regimen for metastatic or unresectable locally advanced disease. A participant who receives a neoadjuvant or adjuvant platinum-containing regimen following cystectomy for localized muscle-invasive urothelial carcinoma is acceptable (without further systemic treatment), if recurrence/progression occurs ≤ 12 months following completion of therapy.
  • Measurable disease based on RECIST v1.1.
  • Have provided an archival tumor tissue sample or newly obtained core or excisional biopsy of a tumor lesion not previously irradiated for PD-L1 analysis.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Adequate organ function per protocol-defined criteria.

You CAN'T join if...

  • Urothelial carcinoma that is suitable for local therapy with curative intent.
  • History or presence of an abnormal electrocardiogram (ECG) that, in the investigator's opinion, is clinically meaningful.
  • Known additional malignancy that is progressing or has required active treatment within the past 3 years.
  • Known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Participants with previously treated brain metastases may participate provided they are radiologically stable, ie, without evidence of progression for at least 4 weeks by repeat imaging.
  • Active autoimmune disease that has required systemic treatment in past 2 years.
  • Known history of human immunodeficiency virus (HIV) infection. HIV testing is not required unless mandated by local health authority.
  • Known history of or is positive for active hepatitis B (HBsAg reactive) or has active hepatitis C (HCV RNA). Note: Testing must be performed to determine eligibility.
  • Use of protocol-defined prior/concomitant therapy.


  • University of California Irvine Medical Center
    Orange California 92868 United States
  • UCLA Hematology Oncology Santa Monica
    Santa Monica California 90404 United States


in progress, not accepting new patients
Start Date
Completion Date
Incyte Corporation
Phase 3
Study Type
Last Updated