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What ACMG variant classifications mean (and don't mean)
Pathogenic, VUS, benign — what each label says about probability versus evidence.
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A genetic report's classification isn't a yes/no verdict — it's a statement about how much evidence currently links a variant to a condition. Reading it that way prevents a lot of unnecessary fear.
The five-tier scale, in plain words
- Pathogenic — strong evidence it's disease-causing.
- Likely pathogenic — good but not conclusive evidence.
- VUS (variant of uncertain significance) — not enough evidence either way. Common, and not a diagnosis.
- Likely benign — probably harmless.
- Benign — confidently harmless.
The part people miss
A VUS is the most misread label. It does not mean 'probably bad' — it means 'unknown.' Classifications also change over time as evidence grows, so today's VUS may be reclassified later.
Educational, not medical advice: always interpret a report with a qualified genetic counsellor or clinician. NeuroTranslate can help you prep the questions.