This is a multi-center, non-interventional, study with the aim to access routine practice of diagnostic and treatment approaches in patients with NSCLC and SCLC in 50 largest oncology centers in Russian Federation. The data for all 2000 patients with LA NSCLC and LS-SCLC who receiving CRT will have been collected for 2 years from the primary medical records. Demographic and clinical characteristics of the patients, information of routine diagnostics procedures and treatment approaches for patients with unresectable LA NSCLC and LS-SCLC and the treatment results of the end of CRT will be collected. Information about any specific NSCLC or SCLC treatments following CRT (e.g., durvalumab) will not be collected in the study. Patients with NSCLC and SCLC meeting the inclusion criteria will be prospectively enrolled into the study. Study procedures will comply with all the local regulatory requirements regarding AE reporting (pharmacovigilance). Study design considers secondary data collection approach using existing patients' medical records, after patients' visits according to routine sites' practice. Data for visit (record) 1 will be collected at the start of CRT (concurrent or sequential), and data for visit (record) 2 will be collected after the last dose of RT and with CT control results available, but the time frame for this data collection is expected to be no later than 6 months after visit 1.

Inclusion Criteria:

1. Age ≥ 18 years old
2. Provision of written informed consent
3. Patient received at least one RT dose under prescribed CRT (concurrent or sequential) for definitive treatment of locally advanced NSCLC (stage II-III, unresectable or inoperable NSCLC, including locoregional recurrence and patient's refusal to undergo surgery) or LS-SCLC based on local MDT decision
4. Patient is currently undergoing RT (preferably no more than 10 doses)

Exclusion Criteria:

1. Participation in another clinical study with an investigational product during the last 3 months
2. Confirmation that the subject was already included in this study before
3. Absence of written informed consent form
4. Data erroneously collected from subjects for which written consent is not available, will not be included in or will be deleted from the study database.

The study will include 2000 patients who received chemoradiotherapy (cCRT or sCRT) for the treatment of locally advanced NSCLC and SCLC in 50 largest oncology centers in Russian Federation. The total enrolment period will take up to 2 years. Information about specific NSCLC or SCLC treatments following CRT (e.g., durvalumab) will not be collected in the study.

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.