This prospective, multicountry, multicentre, non-interventional study plans to include patients who have undergone surgery for early-stage (IA to IIIB on the basis of pathologic criteria) non-squamous NSCLC up to 6 weeks prior to enrolment into the study.

The main objective of this study is to determine the prevalence of EGFRm in patients with surgically resected early-stage (IA to IIIB) non-squamous NSCLC as there are limited data on its prevalence in this patient population.

This prospective, multicountry, multicentre, non-interventional study plans to include patients who have undergone surgery for early-stage (IA to IIIB on the basis of pathologic criteria) non-squamous NSCLC up to 6 weeks prior to enrolment into the study. Eligible patients should have availability of formalin-fixed paraffin-embedded (FFPE) specimen(s) to be primarily tested for EGFRm at validated local laboratories or a central laboratory. The informed consent will be obtained from the patients during their routine clinical care visit before data are collected from the medical records. The data on socio-demographics, tumour staging, histology, surgical management, and neoadjuvant therapies will be collected from available medical records at the treating facility by the investigator. If PD-L1 testing is conducted as part of routine clinical care, the available results will be recorded. Patients will be followed prospectively and follow-up will be considered as complete once EGFRm status of the patient's tumour sample is known and any planned adjuvant therapy has been recorded.

Inclusion Criteria:

• Adult male or female patients ≥18 years old or 'adults' according to age of majority as defined by the local regulations
• Patient or next of kin/legal representative is willing and able to provide informed consent according to the local regulations, where applicable
• Patients with stage IA to IIIB (on the basis of pathologic criteria) NSCLC with adenocarcinoma, or mixed histology with an adenocarcinoma component who have undergone surgical resection of the tumour during the preceding 6 weeks
• Availability of FFPE tissue specimen suitable for EGFRm testing (either the primary diagnostic sample or the surgically resected tumour specimen)
• Availability of medical records at the participating site detailing the initial diagnosis, staging, and surgical management of NSCLC

Exclusion Criteria:

Patients who fulfil any of the following exclusion criteria will not be eligible for the study:

1. Histology of the tumour is considered not to be of primary lung in origin
2. Histology is pure squamous cell carcinoma, pure small cell carcinoma, or large cell carcinoma origin lacking any immunohistochemistry evidence of adenocarcinoma differentiation -

patients who have stage IA to IIIB NSCLC with non-squamous histology and who have undergone surgical resection of tumour up to 6 weeks prior to enrolment

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal.

All request will be evaluated as per the AZ disclosure commitment:

https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure. Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA Pharma Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

When a request has been approved AstraZeneca will provide access to the deidentified individual patient-level data in an approved sponsored tool . Signed Data Sharing Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information. Additionally, all users will need to accept the terms and conditions of the SAS MSE to gain access. For additional details, please review the Disclosure Statements at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.