Liquid Biopsy


Liquid biopsy is a quick method for assessing DNA from tumor samples and allows for the potential of serial sampling. This non-invasive technology makes it feasible to expand oncology research to include cohorts that are unable to undergo a standard biopsy procedure or did not yield adequate tissue samples. With liquid biopsy, researchers can analyze biomarkers circulating in the bloodstream obtained through a conventional blood draw.

Circulating tumor DNA (ctDNA) has gained significance as a biomarker for cancer as they are released into the bloodstream by delocalized tumor cells, thus having the potential to provide a more accurate representation of tumor heterogeneity compared to tissue samples.1

Advantages of liquid biopsy
  • Simple, fast and minimally-invasive
  • Potential to overcome the challenges of tumor heterogeneity
  • Potential for serial testing and longitudinal monitoring of tumor burden
Liquid Biopsy for Next Generation Sequencing

Explore the benefits of utilizing high-performance NGS-based liquid biopsy assays, the AVENIO ctDNA Analysis Kits, for clinical research in oncology.

Key technical challenges of circulating tumor DNA (ctDNA)

limited input molecules

There is very little circulating DNA per blood draw2

ultralow detection limit

A very small percentage (as few as 0.01%) of circulating DNA is tumor-derived3

broad coverage

Tumor-specific mutations differ among research subjects4

AVENIO ctDNA Analysis Kits, a portfolio of three next-generation sequencing (NGS) liquid biopsy assays, overcome these challenges with proven molecular techniques and proprietary error suppression strategies.5

Learn more about AVENIO ctDNA Analysis Kits.


  1. Diaz LA and Bardelli A. Liquid biopsies: genotyping circulating tumor DNA. J Clin Oncol. 2014; 32(6):579-586.
  2. Volik S, Alcaide M, Morin R, Collins C. Cell-free DNA (cfDNA): Clinical Significance and Utility in Cancer Shaped By Emerging Technologies. Molecular Cancer Research. 2016;14(10):898-908. doi:10.1158/1541-7786.mcr-16-0044.
  3. Francis G, Stein S. Circulating Cell-Free Tumour DNA in the Management of Cancer. International Journal of Molecular Sciences. 2015;16(6):14122-14142. doi:10.3390/ijms160614122.
  4. Salk J, Fox E, Loeb L. Mutational Heterogeneity in Human Cancers: Origin and Consequences. Annual Review of Pathology: Mechanisms of Disease. 2010;5(1):51-75. doi:10.1146/annurev-pathol-121808-102113.
  5. Newman AM, Lovejoy AF, Klass DM, et al. Integrated digital error suppression for improved detection of circulating tumor DNA. Nature Biotechnology. 2016;34(5):547–555. doi:10.1038/nbt.3520.


For Research Use Only. Not for use in diagnostic procedures.