Related Experiment Video
Updated: Jun 25, 2025
13:24
Integration of Wet and Dry Bench Processes Optimizes Targeted Next-generation Sequencing of Low-quality and Low-quantity Tumor Biopsies
Published on: April 11, 2016
11.8K
Resolving Discrepancies in Idylla BRAF Mutational Assay Results Using Targeted Next-Generation Sequencing
Giby V George1, Huijie Liu1, Audrey N Jajosky1
1Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY 14642, USA.
Genes
|May 25, 2024
Summary
The Idylla BRAF assay can identify BRAF V600 mutations but may produce unusual amplification curves. Reflex next-generation sequencing (NGS) is recommended for non-classical results to ensure accurate BRAF mutation detection.
Area of Science:
- Oncology
- Molecular Diagnostics
- Genetics
Background:
- Accurate BRAF mutation identification is crucial for targeted therapy selection in various cancers.
- The Idylla BRAF mutation assay offers rapid detection of common BRAF V600 mutations in FFPE samples.
Purpose of the Study:
- To validate the Idylla BRAF mutation assay in a clinical laboratory setting.
- To investigate and characterize unusual amplification patterns observed during assay use.
Main Methods:
- Validation of the Idylla BRAF mutation assay.
- Retrospective analysis of cases with identified BRAF mutations using next-generation sequencing (NGS).
- Evaluation of amplification curve patterns, including double and single delayed amplifications.
Main Results:
- The Idylla BRAF assay validation identified unusual amplification curves in some cases.
- Three cases showed delayed amplification within a double amplification pattern, and two had false-positive calls.
- No additional false-positive cases were found upon retrospective NGS evaluation of BRAF mutations near codon V600.
Conclusions:
- Non-classical amplification curves in the Idylla BRAF assay may indicate non-specific amplification or low-level variants.
- Reflex NGS testing is recommended for Idylla BRAF cases with non-classical amplification curves.
- Findings may apply to other Idylla assays targeting hotspot mutations in genes like EGFR, IDH1/2, KRAS, and NRAS.
