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Updated: May 11, 2026

Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors
Published on: September 20, 2016
Rare mutations in non-small-cell lung cancer
Manolo D'Arcangelo1, Armida D'Incecco, Federico Cappuzzo
1University of Colorado Cancer Center, Anschutz Medical Campus, 12801 East 17th Avenue, Aurora, CO 80045, USA.
Abstract:
In the last decade, new insights in molecular biology have changed the therapeutic landscape of non-small-cell lung cancer. Since 2004, when activating mutations of the EGFR were firstly identified, several genetic aberrations have been discovered, mainly in adenocarcinoma. EGFR mutations are a relatively frequent event in non-small-cell lung cancer, generally consisting of exon 19 deletion or exon 21 substitution. In adenocarcinoma, additional rare mutations are detectable in the EGFR gene, as well as in other genes, including ALK, ROS1, RET, HER2 and BRAF. Recent studies in squamous cell carcinoma identified TP53 as the most frequent mutation, followed by additional more rare mutations, including PI3KCA, PTEN, DDR2 and FGFR. The aim of the present review is to analyze the potential prognostic and predictive role of rare mutations.
Insights
Recent molecular biology insights reveal rare genetic mutations in non-small-cell lung cancer (NSCLC). This review analyzes the prognostic and predictive roles of these uncommon mutations, particularly in adenocarcinoma and squamous cell carcinoma.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Molecular biology advancements have reshaped non-small-cell lung cancer (NSCLC) therapeutics.
- Activating mutations in the Epidermal Growth Factor Receptor (EGFR) were identified in 2004, leading to discoveries of other genetic aberrations.
- Common EGFR mutations (exon 19 deletion, exon 21 substitution) occur frequently in NSCLC, predominantly in adenocarcinoma.
Purpose of the Study:
- To review and analyze the prognostic and predictive significance of rare genetic mutations in NSCLC.
- To explore mutations beyond common EGFR alterations in both adenocarcinoma and squamous cell carcinoma subtypes.
Main Methods:
- Literature review of recent studies on molecular biology and NSCLC.
- Analysis of genetic aberrations identified in NSCLC, focusing on rare mutations.
- Categorization of mutations based on NSCLC histology (adenocarcinoma vs. squamous cell carcinoma).
Main Results:
- Adenocarcinoma exhibits rare mutations in EGFR, ALK, ROS1, RET, HER2, and BRAF.
- Squamous cell carcinoma is characterized by TP53 as the most frequent mutation, alongside rarer mutations in PI3KCA, PTEN, DDR2, and FGFR.
- The study highlights a growing list of actionable genetic targets in NSCLC.
Conclusions:
- Rare mutations in NSCLC, including those in EGFR, ALK, ROS1, and others, hold significant prognostic and predictive potential.
- Understanding these rare genetic alterations is crucial for advancing personalized medicine in NSCLC treatment.
- Further research is warranted to fully elucidate the clinical impact of these uncommon mutations.
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