Cited by 473Lung Cancer Treatments and MutationsCancer Genomics and DiagnosticsHER2/EGFR in Cancer Research

EGFR Exon 20 Insertion Mutations in Lung Adenocarcinomas: Prevalence, Molecular Heterogeneity, and Clinicopathologic Characteristics

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Arcila, Maria E., Nafa, Khedoudja, Chaft, Jamie E., Rekhtman, Natasha, Lau, Christopher, Reva, Boris A., Zakowski, Maureen F., Kris, Mark G. +1 more·2013·Molecular Cancer Therapeutics

Published version of a preprint

Abstract

In contrast to other primary epidermal growth factor receptor (EGFR) mutations in lung adenocarcinomas, insertions in exon 20 of EGFR have been generally associated with resistance to EGFR-tyrosine kinase inhibitors. Their molecular spectrum, clinicopathologic characteristics, and prevalence are not well established. Tumors harboring EGFR exon 20 insertions were identified through an algorithmic screen of 1,500 lung adenocarcinomas. Cases were first tested for common mutations in EGFR (exons 19 and 21) and KRAS (exon 2) and, if negative, further analyzed for EGFR exon 20 insertions. All samples underwent extended genotyping for other driver mutations in EGFR, KRAS, BRAF, ERBB2/HER2, NRAS, PIK3CA, MEK1, and AKT by mass spectrometry; a subset was evaluated for ALK rearrangements. We identified 33 EGFR exon 20 insertion cases [2.2%, 95% confidence interval (CI), 1.6-3.1], all mutually exclusive with mutations in the other genes tested (except PIK3CA). They were more common among never-smokers (P < 0.0001). There was no association with age, sex, race, or stage. Morphologically, tumors were similar to those with common EGFR mutations but with frequent solid histology. Insertions were highly variable in position and size, ranging from 3 to 12 bp, resulting in 13 different insertions, which, by molecular modeling, are predicted to have potentially different effects on erlotinib binding. EGFR exon 20 insertion testing identifies a distinct subset of lung adenocarcinomas, accounting for at least 9% of all EGFR-mutated cases, representing the third most common type of EGFR mutation after exon 19 deletions and L858R. Insertions are structurally heterogeneous with potential implications for response to EGFR inhibitors.

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  1. [29]Yasuda H Kobayashi S Costa DB EGFR exon 20 insertion mutations in non-small-cell lung cancer: preclinical data and clinical implications The Lancet Oncology 2012 13 e23 e31 21764376

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Authors
Arcila, M. E., Nafa, K., Chaft, J. E., Rekhtman, N., Lau, C., Reva, B. A., Zakowski, M. F., Kris, M. G., & Ladanyi, M.
Affiliations
  • Memorial Sloan Kettering Cancer Center (US)
  • Authors' Affiliations: 1Department of Pathology; 2Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine; 3Computational Biology Center; and 4Human Oncology and Pathogenesis Program, Memorial Sloan-Kettering Cancer Center, New York, New York
Corresponding author
Arcila, Maria E.
Venue
Molecular Cancer Therapeutics
Published
2013-02-01
Volume
12
Issue
2
Pages
220-229
ISSN
  • 1535-7163 (ISSN-L)
  • 1538-8514
OpenAlex
W2143863753
Cited by
473
References
38
Citations by year
2026: 20 · 2025: 42 · 2024: 43 · 2023: 42 · 2022: 66 · 2021: 55 · 2020: 43 · 2019: 30 · 2018: 31 · 2017: 22 · 2016: 20 · 2015: 23 · 2014: 24 · 2013: 12
FWCI
21.40
Type
journal article
Language
en
Open access
Locations
  • Molecular Cancer Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Memorial Sloan-Kettering Cancer Center
  • National Institutes of Health (UL1TR000457)
  • National Cancer Institute (P01CA129243, NIH P01 CA129243)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
Keywords
EGFR exon 20 insertion, lung adenocarcinoma, EGFR tyrosine kinase inhibitors, erlotinib resistance, molecular heterogeneity, never smokers, driver mutations, PIK3CA, ALK rearrangement, clinicopathological features
MeSH terms
Adenocarcinoma of Lung, Adenocarcinoma, Adult, Aged, Aged, 80 and over, Exons, Female, Humans, Lung Neoplasms, Male, Middle Aged, Prevalence, Survival Analysis, Mutagenesis, Insertional, ErbB Receptors

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