P668: Challenges in newborn sequencing: Classification of variants with measurable biological dysfunction but limited clinical significance

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Authors: Christin D. Collins, Adam Coovadia, Rizwan Yousaf, Xiangwen Chen‐Deutsch, Madhuri Hegde
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Abstract

Variant interpretation is a cornerstone of clinical laboratory genomics, guided by the American College of Medical Genetics and Genomics (ACMG) framework, which classifies variants into five categories: pathogenic, likely pathogenic, uncertain significance, likely benign, and benign. However, the expansion of newborn genomic sequencing reveals a subset of variants that challenge this framework—those with impaired biochemical function or reduced enzymatic activity (often identified by newborn screening laboratory testing) but without clear evidence of clinical disease.

Fields of Study & Subjects

Genomics and Rare Diseases Metabolism and Genetic Disorders Prenatal Screening and Diagnostics

Publication details

Journal / source
Genetics in Medicine Open
Volume
4
Pages
104158–104158
Publication date
1 January 2026
Language
EN