Cited by 362Lung Cancer Treatments and MutationsHER2/EGFR in Cancer ResearchCancer Genomics and Diagnostics

Natural History and Molecular Characteristics of Lung Cancers Harboring EGFR Exon 20 Insertions

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Oxnard, Geoffrey R., Lo, Peter C., Nishino, Mizuki, Dahlberg, Suzanne E., Lindeman, Neal I., Butaney, Mohit, Jackman, David M., Johnson, Bruce E. +1 more·2013·Journal of Thoracic Oncology

Abstract

Introduction Exon 20 insertions are the third most common family of epidermal growth factor receptor (EGFR) mutations found in non-small-cell lung cancer (NSCLC). Little is known about cancers harboring these mutations aside from their lack of response to EGFR tyrosine kinase inhibitors, impairing the development of effective targeted therapies.Methods NSCLC patients with EGFR genotyping were studied using a mechanism approved by the Institutional Review Board. Cancers with exon 20 insertions were indentified, sequences were characterized, and effectiveness of different treatment regimens was reviewed retrospectively. Clinical characteristics and survival were compared with cancers harboring common EGFR mutations and cancers with wild-type EGFR.Results One thousand eighty-six patients underwent EGFR genotyping from 2004 to 2012. Twenty seven (2.5%) harbored exon 20 insertions, making up 9.2% of all cancers with documented EGFR mutations. Compared with wild-type cancers, those with exon 20 insertions were more commonly found in never-smokers and Asian patients. Insertion sequences were highly variable, with the most common variant (V769_D770insASV) making up only 22% of cases. Median survival of patients with exon 20 insertions was 16 months, similar to the survival of wild-type cancers and shorter than the survival of cancers with common EGFR mutations.Conclusions Patients with EGFR exon 20 insertions have similar clinical characteristics to those with common EGFR mutations but a poorer prognosis. The prevalence of this subset of NSCLC is similar to that of other genotype-defined subsets of lung adenocarcinoma (e.g. those with BRAF mutations, HER2 insertions, ROS1 rearrangements) and is a population of interest for trials of new targeted therapies.

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Authors
Oxnard, G. R., Lo, P. C., Nishino, M., Dahlberg, S. E., Lindeman, N. I., Butaney, M., Jackman, D. M., Johnson, B. E., & Jänne, P. A.
Affiliations
  • Brigham and Women's Hospital (US)
  • Dana-Farber Cancer Institute (US)
Corresponding author
Oxnard, Geoffrey R.
Venue
Journal of Thoracic Oncology
Publisher
Elsevier BV
Published
2013-02
Volume
8
Issue
2
Pages
179-184
ISSN
1556-0864 (ISSN-L)
OpenAlex
W2075445339
Cited by
360
References
32
Citations by year
2026: 17 · 2025: 30 · 2024: 33 · 2023: 41 · 2022: 50 · 2021: 36 · 2020: 31 · 2019: 26 · 2018: 24 · 2017: 19 · 2016: 16 · 2015: 15 · 2014: 15 · 2013: 7
FWCI
14.35
Type
journal article
Language
en
Open access
Locations
  • Journal of Thoracic Oncology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5k23ca157631-02)
  • National Cancer Institute (K23-CA157631, P50CA090578, R01CA135257)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
EGFR exon 20 insertion, non-small cell lung cancer, lung adenocarcinoma, EGFR mutation, EGFR tyrosine kinase inhibitors, survival, never smokers, Asian patients, targeted therapy, molecular properties
MeSH terms
Adult, Aged, Aged, 80 and over, Amino Acid Sequence, Carcinoma, Non-Small-Cell Lung, Carcinoma, Squamous Cell, Exons, Female, Follow-Up Studies, Humans, Lung Neoplasms, Male, Middle Aged, Molecular Sequence Data, Mutation, Neoplasm Staging, Prognosis, Retrospective Studies, Survival Rate, Mutagenesis, Insertional, Sequence Homology, Amino Acid, Young Adult, ErbB Receptors

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