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



The purpose of this study is to assess whether postoperative adjuvant therapy with mRNA-4157 and pembrolizumab improves recurrence free survival (RFS) compared to pembrolizumab alone in patients with complete resection of cutaneous melanoma and a high risk of recurrence.

Official Title

A Phase 2 Randomized Study of Adjuvant Immunotherapy With the Personalized Cancer Vaccine mRNA-4157 and Pembrolizumab Versus Pembrolizumab Alone After Complete Resection of High-Risk Melanoma (KEYNOTE- 942)


Melanoma mRNA-4157 Personalized cancer vaccine PCV Pembrolizumab Moderna Vaccines


You can join if…

Open to people ages 18 years and up

  • Resectable cutaneous melanoma metastatic to a lymph node and at high risk of recurrence
  • Complete resection within 13 weeks before study enrollment
  • Disease free at study entry (after surgery) with no loco-regional relapse or distant metastasis and no clinical evidence of brain metastases
  • Has an FFPE tumor sample available suitable for sequencing
  • ECOG Performance Status 0 or 1
  • Normal organ and marrow function reported at screening

You CAN'T join if...

  • Prior malignancy, unless no evidence of that disease for at least 5 years prior to study entry
  • Prior systemic anti-cancer treatment (except surgery and interferon for thick primary melamonas. Radiotherapy after lymph node dissection is permitted)
  • Live vaccine within 30 days prior to the first dose of pembrolizumab
  • Transfusion of blood or administration of colony stimulating factors within 2 weeks of the screening blood sample
  • Active autoimmune disease
  • Immunodeficiency, systemic steroid therapy or any other immunosuppressive therapy within 7 days prior to the first dose of pembrolizumab
  • Solid organ or allogeneic bone marrow transplant
  • Pneumonitis or a history of (noninfectious) pneumonitis that required steroids
  • Prior interstitial lung disease
  • Clinically significant heart failure
  • Known history of HIV
  • Known active hepatitis B or C
  • Active infection requiring treatment


  • UC San Diego Moores Cancer Center not yet accepting patients
    La Jolla California 92093 United States
  • Angeles Clinic and Research Institute accepting new patients
    Santa Monica California 90404 United States


accepting new patients
Start Date
Completion Date
ModernaTX, Inc.
Phase 2
Study Type
Last Updated