Precision Diagnostics in Myeloid Malignancies: Development and Validation of a National Capture-Based Gene Panel

Area of Science:

• Genomics
• Molecular Diagnostics
• Hematology

Background:

• Gene panel sequencing is crucial for diagnosing myeloid neoplasms.
• Existing panels often have limitations in content, sensitivity, and validation.

Purpose of the Study:

• To develop and validate the Genomic Medicine Sweden myeloid gene panel (GMS-MGP).
• To establish a nationally harmonized approach for precision diagnostics in myeloid malignancies.

Main Methods:

• Development of a 191-gene capture-based panel (GMS-MGP).
• Validation using 117 known somatic variants with a 0.5% limit-of-detection.
• Interlaboratory comparison and prospective patient analysis.

Main Results:

• GMS-MGP demonstrated uniform coverage, including GC-rich regions.
• 100% concordance with known variants at 0.5% variant allele frequency (VAF).
• High concordance in detection rate and VAFs during interlaboratory testing.

Conclusions:

• The GMS-MGP workflow enables sensitive detection of clinically relevant genes and novel mutations.
• Its capture-based design allows for easy updates to incorporate new guidelines.
• The panel is a significant advancement for harmonized precision diagnostics in myeloid malignancies.