Examining the Effect of ALK and EGFR Mutations on Survival Outcomes in Surgical Lung Brain Metastasis Patients

SIMPLE SUMMARY: In this research study, the authors investigated the impact of specific genetic mutations on the survival of lung cancer patients with brain metastases who underwent surgical resection. These mutations, known as anaplastic lymphoma kinase (ALK)-rearranged and epidermal growth factor receptor (EGFR)-amplified mutations, have shown potential for targeted treatments. The study analyzed data from patients who received surgical treatment at Emory University Hospital between 2012 and 2022. Results showed that the overall survival and progression-free survival rates in this group were better than those seen in earlier studies. The study suggests that as more targeted therapies become available, the survival rates for lung cancer patients with brain metastases may continue to improve. The findings emphasize the importance of individualized treatments based on genetic mutations. ABSTRACT: In the context of the post-genomic era, where targeted oncological therapies like monoclonal antibodies (mAbs) and tyrosine-kinase inhibitors (TKIs) are gaining prominence, this study investigates whether these therapies can enhance survival for lung carcinoma patients with specific genetic mutations—EGFR-amplified and ALK-rearranged mutations. Prior to this study, no research series had explored how these mutations influence patient survival in cases of surgical lung brain metastases (BMs). Through a multi-site retrospective analysis, the study examined patients who underwent surgical resection for BM arising from primary lung cancer at Emory University Hospital from January 2012 to May 2022. The mutational statuses were determined from brain tissue biopsies, and survival analyses were conducted. Results from 95 patients (average age: 65.8 ± 10.6) showed that while 6.3% had anaplastic lymphoma kinase (ALK)-rearranged mutations and 20.0% had epidermal growth factor receptor (EGFR)-amplified mutations—with 9.5% receiving second-line therapies—these mutations did not significantly correlate with overall survival. Although the sample size of patients receiving targeted therapies was limited, the study highlighted improved overall survival and progression-free survival rates compared to earlier trials, suggesting advancements in systemic lung metastasis treatment. The study suggests that as more targeted therapies emerge, the prospects for increased overall survival and progression-free survival in lung brain metastasis patients will likely improve.