EGFR and non-small cell lung carcinoma: In a retrospective study in patients with synchronous oligometastatic (probably sync-oligometastases) epidermal growth factor receptor (EGFR)-mutant non-small cell lung cancer who were treated with an EGFR-tyrosine kinase inhibitor, OS improved only in patients who received local ablative therapy for the primary lesion and for all oligometastatic lesions [21].