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A Phase 3, Randomized, Double-blind, Placebo- and Active-Comparator Controlled Study of MK-1084 Plus Durvalumab Versus Placebo Plus Durvalumab in Participants With Locally Advanced, Unresected KRAS G12C-Mutant Non-Small Cell Lung Cancer Without Disease Progression Following Definitive Platinum-Based Chemoradiotherapy (KANDLELIT-015)

MK-1084 with Durvalumab vs Durvalumab in Unresected KRAS G12C-Mutant LA-NSCLC

Fujita Tomoko

MSD K.K.

KITANOMARU SQUARE,1-13-12,Kudan-kita,Chiyoda-ku,Tokyo 102-8667,Japan

msdjrct@msd.com

MSDJRCT inquiry mailbox

MSD K.K.

KITANOMARU SQUARE,1-13-12,Kudan-kita,Chiyoda-ku,Tokyo 102-8667,Japan

+81-3-6272-1957

msdjrct@msd.com

Recruiting

Sept. 17, 2026

Interventional

randomized controlled trial

double blind

active control

parallel assignment

treatment purpose

- Has a histological or cytological diagnosis of locally advanced, unresected Stage II (node-positive) to III non-small cell lung cancer (NSCLC) with predominantly nonsquamous histology.
- Has completed definitive platinum-based concurrent chemoradiotherapy (CCRT) prior to enrollment, without disease progression.
- Has provided a tumor tissue sample for central laboratory testing of Kirsten rat sarcoma G12C (KRAS G12C) status, programmed cell death ligand 1 (PD-L1) status, and biomarker research.
- Tumor tissue sample has a demonstrated presence of KRAS G12C mutation and an evaluable PD-L1 status result.
- If human immunodeficiency virus (HIV)-infected, has well-controlled HIV on antiretroviral therapy (ART).
- If hepatitis B surface antigen (HBsAg)-positive, has undetectable hepatitis B virus (HBV) viral load and has received HBV antiviral therapy.
- If has a history of hepatitis C virus (HCV) infection, has undetectable HCV viral load.
- Has a body weight >=35 kg.

- Has a diagnosis of small cell lung cancer or mixed tumors with small cell elements.
- Has a gastrointestinal disorder affecting absorption or is unable to swallow orally administered medication.
- Has active inflammatory bowel disease requiring immunosuppressive medication or previous clear history of inflammatory bowel disease.
- Has uncontrolled, significant cardiovascular disease or cerebrovascular disease.
- Is HIV-infected with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease.
- Has received prior treatment (other than definitive CCRT) for NSCLC.
- Has a known additional malignancy that is progressing or has required active treatment within the past 3 years.
- Has an active autoimmune disease that has required systemic treatment in the past 2 years.
- Has a history of, or has current, (noninfectious) pneumonitis/interstitial lung disease that required/requires steroids.
- Has an active infection requiring systemic therapy.
- Has a history of stem cell/solid organ transplant.
- Has not adequately recovered from major surgery or has ongoing surgical complications.

Both

Non-small cell lung cancer

Arm A: MK-1084 and durvalumab.
Arm B: Placebo and durvalumab.

Progression-free survival

- Overall survival
- Safety and tolerability
- Objective response and duration of response
- Distant metastasis-free survival
- Global health status/QoL, Physical functioning and Role functioning

+81-22-728-8000

June. 18, 2026

Yes

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