Perioperative Enfortumab Vedotin (EV) Plus Pembrolizumab (MK-3475) Versus Neoadjuvant Chemotherapy for Cisplatin-eligible Muscle Invasive Bladder Cancer (MIBC) (MK-3475-B15/ KEYNOTE-B15 / EV-304) (KEYNOTE-B15)

Perioperative Enfortumab Vedotin (EV) Plus Pembrolizumab (MK-3475) Versus Neoadjuvant Chemotherapy for Cisplatin-eligible Muscle Invasive Bladder Cancer (MIBC) (MK-3475-B15/ KEYNOTE-B15 / EV-304) (KEYNOTE-B15)

Brief Summary:
The purpose of this study is to assess the antitumor efficacy and safety of perioperative enfortumab vedotin (EV) plus pembrolizumab and radical cystectomy (RC) + pelvic lymph node dissection (PLND) compared with the current standard of care (neoadjuvant chemotherapy [gemcitabine plus cisplatin] and RC + PLND) for participants with MIBC who are cisplatin-eligible. The dual primary hypotheses are preoperative EV + pembrolizumab and RC + PLND (Arm A) will achieve superior pathologic complete response (pCR) rate and perioperative EV and pembrolizumab and RC + PLND (Arm A) will achieve superior event free survival (EFS) compared with neoadjuvant gemcitabine + cisplatin and RC + PLND (Arm B).


Study Type: Interventional (Clinical Trial)
Estimated Enrollment: 784 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Masking Description: Open label
Primary Purpose: Treatment
Official Title: A Phase 3, Randomized, Open-label Study to Evaluate Perioperative Enfortumab Vedotin Plus Pembrolizumab (MK-3475) Versus Neoadjuvant Gemcitabine and Cisplatin in Cisplatin-eligible Participants With Muscle-invasive Bladder Cancer (KEYNOTE-B15 / EV-304)
Actual Study Start Date: April 21, 2021
Estimated Primary Completion Date: June 23, 2026
Estimated Study Completion Date: June 23, 2026

Arms:
- Experimental: Arm A: Perioperative EV+ Pembrolizumab and RC + PLND
- Experimental: Arm B: Neoadjuvant chemotherapy (gemcitabine + cisplatin) and RC + PLND

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