study the effect of radiotherapy to the primary lesion after first line systemic therapy in metastatic non-small cell lung cancer patients.

Metastatic non-small cell lung cancer patients after receiving their first line systemic therapy according to their genetic mutation will be randomized to follow up versus radiotherapy to the primary lesion.

Inclusion Criteria:

1. Confirmed histological diagnosis of NSCLC.
2. Stage IV disease.
3. Patients with P.S ≤ 2.
4. finished at least 4 cycles of platinum-based doublet chemotherapy if patient has no diver mutation, or at least 3 months of anti-EGFR, Anti-ALK according to their driver mutation with SD, PR or CR.

Exclusion Criteria:

1. History of prior irradiation to the lung.
2. residual Malignant pleural or pericardial effusion at randomization time.
3. History of prior malignant tumor likely to interfere with the treatment protocol.
4. Severe comorbidities as measured by morbidity index.
5. Disease progression on first line systemic therapy.

after publishing the primary results. and if further publications will be based on these data, should add us as co investigators.

after publishing the primary results.

via mail contact to the primary investigator