MK-3475A±Calderasib (MK-1084) in Completely Resected Stage IIA-IIIB (N2) KRAS G12Cm NSCLC (MK-1084-013)

Inclusion criteria

• Has a histological/cytological diagnosis of non-small cell lung cancer (NSCLC) with predominantly nonsquamous histology and meets one of the following criteria:

• Has newly diagnosed, treatment-naïve, resectable, clinical Stage IIA-IIIB (N2) NSCLC
• Has completely resected, pathological Stage IIA-IIIB (N2) NSCLC, including those previously treated outside the study with neoadjuvant platinum-doublet chemotherapy plus pembrolizumab or MK-3475A, or those who received adjuvant platinum-doublet chemotherapy.
• Tumor tissue shows the presence of Kirsten rat sarcoma viral oncogene homolog G12C (KRAS G12C) mutation
• No more than 12 weeks have elapsed between either the surgery following neoadjuvant treatment or last dose of adjuvant platinum-based chemotherapy and the first dose of investigational adjuvant study intervention.
• Has no evidence of disease based on postsurgical radiological assessment as documented by contrast-enhanced chest/abdomen computed tomography (or magnetic resonance imaging) within 28 days before randomization
• Has an Eastern Cooperative Oncology Group performance status of 0 or 1 within 10 days before the first dose of the study intervention
• Human immunodeficiency virus-infected participants must have well controlled HIV on antiretroviral therapy
• Participants who are Hepatitis B surface antigen positive are eligible if they have received hepatitis B virus (HBV) antiviral therapy and have undetectable HBV viral load
• Participants with history of hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable

Exclusion criteria

• Has a diagnosis of any 1 of the following tumor types/locations: small cell lung cancer or, for mixed tumors, presence of small cell elements, neuroendocrine tumor with large cell components, sarcomatoid carcinoma, or NSCLC involving the superior sulcus
• HIV-infected participants with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease
• Has active inflammatory bowel disease requiring immunosuppressive medication or previous clear history of inflammatory bowel disease (eg, Crohn's disease, ulcerative colitis, chronic diarrhea)
• Has uncontrolled, significant cardiovascular disease or cerebrovascular disease within the 6 months preceding study intervention
• Is unable to swallow orally administered medication, or has a gastrointestinal disorder affecting absorption (e.g. gastrectomy, partial bowel obstruction, or malabsorption)
• Has 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 except replacement therapy
• Has a history of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
• Has active infection requiring systemic therapy
• Has not adequately recovered from major surgery or has ongoing surgical complications