Circulating Cell-Free DNA Methylation as Biomarker for Lung Cancer Detection: A Systematic Review and Meta-Analysis

Strategic Insights -

A recent study published in Systematic Reviews has revealed new insights into the detection of lung cancer using circulating cell-free DNA (ccfDNA) methylation. The research conducted by the Portuguese Oncology Institute has shown that ccfDNA methylation can detect lung cancer with high specificity but modest sensitivity. The study analyzed 44 eligible articles and found a pooled sensitivity of 54% (CI 95% 48-60%) and a pooled specificity of 86% (CI 95% 83-87%) for lung cancer detection.

Key Takeaways:

  • The study found that circulating cell-free DNA methylation can detect lung cancer with high specificity (86%) but modest sensitivity (54%).
  • The most frequently tested host-genome methylation markers were RASSF1A, APC, SHOX2, SOX17, and HOXA9.
  • The research concluded that further studies are required to improve diagnostic performance, establish methodological standards, and determine whether ccfDNA methylation can complement existing screening strategies.
  • The study highlights the importance of biomarkers in lung cancer detection, with 1961 articles retrieved and 44 meeting inclusion criteria.
  • The research team included Diana Ines Machado, Cancer Biology and Epigenetics Group, Research Center of IPO Porto (CI-IPOP), Portuguese Oncology Institute, and other notable authors such as Tiago Brito-Rocha, Sofia Salta, Teresa Monjardino, Rui Henrique, and Carmen Jeronimo.

Statistics:

  • 1961 articles were retrieved from the systematic review.
  • 44 articles met the inclusion criteria.
  • Pooled sensitivity: 54% (CI 95% 48-60%).
  • Pooled specificity: 86% (CI 95% 83-87%).

Sources:

  • Circulating cell-free DNA methylation as biomarker for lung cancer detection: a systematic review and meta-analysis of diagnostic studies. Systematic Reviews, 2025,14(1):1-17.
  • Systematic Reviews journal: http://www.systematicreviewsjournal.com/
  • Publisher for Systematic Reviews: BMC.
  • doi: 10.1186/s13643-025-02860-w.