A Study of Durvalumab as Consolidation Therapy in Non-Small Cell Lung Cancer Patients

Inclusion Criteria:

1. Age≥18 years
2. Documented NSCLC and present with locally advanced, unresectable (Stage III) disease;
3. Receipt of concurrent or sequential chemoradiation therapy,
4. No progression following definitive, platinum-based, concurrent or sequential chemoradiation therapy
5. World Health Organization (WHO) PS of 0 or 1;
6. No prior exposure to any anti CTLA-4, anti-PD-1, anti-PD-L1, or anti PD L2 antibodies, excluding therapeutic anticancer vaccines
7. Adequate organ and marrow function required
8. Life expectancy of at least 12 weeks
9. Tumor PD-L1 status, with the Ventana SP263 PD-L1 IHC assay determined by a reference laboratory, must be known prior to randomization.
10. Tumour sample requirements are as follows: Provision of a tumour tissue sample (newly acquired sample \<=3 months old is preferred, but an archived sample \<=6 months old is acceptable) in a quantity sufficient to allow for analysis.

Exclusion Criteria:

1. History of allogeneic organ transplantation, or another primary malignancy, or active primary immunodeficiency.
2. Active or prior documented autoimmune or inflammatory disorders
3. Uncontrolled intercurrent illness that would limit compliance with study requirement, substantially increase risk of incurring AEs, or compromise the ability of the patient to give written informed consent
4. Active infection including tuberculosis hepatitis B hepatitis C (HCV), or human immunodeficiency virus (positive human immunodeficiency virus \[HIV\] 1/2 antibodies).
5. Mixed small cell and NSCLC histology, sarcomatoid variant
6. Any unresolved toxicity National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) Grade ≥2 from the prior chemoradiation therapy.
7. Receipt of live attenuated vaccine within 30 days prior to the first dose of IP.
8. Major surgical procedure (as defined by the Investigator) within 28 days prior to the first dose of IP.