Detection of repeat expansion variants using next generation sequencing: A points to consider statement of the American College of Medical Genetics and Genomics (ACMG).

Points to consider for NGS-based detection of repeat expansion variants (ACMG 2026)

This ACMG consensus document establishes points to consider for NGS-based detection of repeat expansion variants. As NGS tools increasingly detect variants traditionally requiring PCR or Southern blot, the ACMG provides a framework for validation, reporting, and interpretation in diagnostic practice.

Synthesis written by Geno'X. For the full original abstract, please refer to the source publication.

The ACMG establishes a standardized framework for NGS-based repeat expansion detection — a rapidly evolving area where lack of consensus generated heterogeneous laboratory practices. Particularly relevant for labs integrating long-read or specialized expansion tools.

Clinical impact: 2/3 · Evidence strength: 2/3 · Novelty: 1/2 · Sample size: 1/1 · Publication status: 1/1 → Total: 7/10