Cited by 83Lung Cancer Treatments and MutationsBrain Metastases and TreatmentLung Cancer Diagnosis and Treatment

Significance of targeted therapy and genetic alterations in EGFR, ALK, or KRAS on survival in patients with non-small cell lung cancer treated with radiotherapy for brain metastases

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Mak, K. S., Gainor, J. F., Niemierko, A., Oh, K. S., Willers, H., Choi, N. C., Loeffler, J. S., Sequist, L. V. +2 more·2015·Neuro-Oncology

Abstract

BACKGROUND: We determined the impact of genetic alterations in EGFR, ALK, or KRAS on survival after radiotherapy for brain metastases in non-small cell lung cancer (NSCLC). METHODS: Of 172 genotyped NSCLC patients treated with radiotherapy for brain metastases in 2005-2012, 54 had cancers with EGFR mutations, 12 had ALK rearrangements, 38 had KRAS mutations, and 68 were wild-type (WT). Overall survival (OS) was determined. RESULTS: Median follow-up was 8.6 months. Median OS was 13.6 months for patients with EGFR mutations and 26.3 months for patients with ALK rearrangements, in contrast to 5.7 months for KRAS-mutant patients and 5.5 months for WT patients (P = .001). On multivariate analysis, adjusting for receipt of targeted therapy after cranial radiotherapy, ALK rearrangements were associated with improved OS (HR, 0.31; 95% CI, 0.13-0.74; P = .008). EGFR mutations were not significantly associated with improved OS on multivariate analysis (HR, 0.71; 95% CI, 0.37-1.38; P = .3). KRAS mutations were also not associated with improved OS (HR, 0.93; 95% CI, 0.59-1.47; P = .8). Receipt of targeted therapy after cranial radiotherapy was independently associated with improved OS (HR, 0.30; 95% CI, 0.17-0.54; P < .001). Receipt of chemotherapy after cranial radiotherapy, number of brain metastases, extracranial metastases, age, and performance status were also associated with OS. CONCLUSIONS: NSCLC patients with genetic alterations in ALK have improved survival outcomes after radiotherapy for brain metastases compared with EGFR, KRAS, or WT. Subsequent receipt of targeted therapy was associated with additional improvement in OS.

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Authors
Mak, K. S., Gainor, J. F., Niemierko, A., Oh, K. S., Willers, H., Choi, N. C., Loeffler, J. S., Sequist, L. V., Shaw, A. T., & Shih, H. A.
Affiliations
Harvard University (US)
Corresponding author
Mak, K. S.
Venue
Neuro-Oncology
Published
2014-07-22
Volume
17
Issue
2
Pages
296-302
ISSN
  • 1522-8517 (ISSN-L)
  • 1523-5866
OpenAlex
W2154996469
Cited by
83
References
49
Citations by year
2026: 1 · 2025: 5 · 2024: 3 · 2023: 6 · 2022: 5 · 2021: 9 · 2020: 6 · 2019: 9 · 2018: 7 · 2017: 10 · 2016: 12 · 2015: 9
FWCI
8.27
Type
journal article
Language
en
Open access
Locations
  • Neuro-Oncology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Brain Metastases and Treatment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Diagnosis and Treatment
Keywords
non-small cell lung cancer, brain metastases, cranial irradiation, EGFR mutation, ALK rearrangement, KRAS mutation, targeted therapy, overall survival, genetic alterations, prognostic factors
MeSH terms
Anaplastic Lymphoma Kinase, Adult, Aged, Aged, 80 and over, Brain Neoplasms, Carcinoma, Non-Small-Cell Lung, Female, Genotype, Humans, Lung Neoplasms, Male, Middle Aged, Proto-Oncogene Proteins, Retrospective Studies, Survival Rate, Proto-Oncogene Proteins p21(ras), Treatment Outcome, ras Proteins, Receptor Protein-Tyrosine Kinases, Kaplan-Meier Estimate, Young Adult, ErbB Receptors

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