A Systematic Framework for the Interpretation of Copy Number Variants (CNVs) with Erin Riggs, MS, CGC

  • [NOTE: This work has not yet been approved by the ACMG Board of Directors, and has not gone out for public member comment. Any of the suggested parameters discussed here are subject to change as a result of the review process]


    Guidelines for the interpretation of postnatal constitutional copy number variants (CNV) were initially published by ACMG in 2011.  While they provide guidance on types of evidence to consider, there are no specific recommendations regarding the relative importance of each in the overall evaluation.  In an effort to provide more specific guidance to users regarding the weights of particular pieces of evidence (in hope of increasing inter-laboratory consistency), as well as to align the updated recommendations where possible with the sequence variant interpretation guidelines published by ACMG/AMP in 2015​, ACMG and the Clinical Genome Resource (ClinGen) have formed a working group to update the existing CNV interpretation guidelines.  Proposed updates to the current guidelines will be reviewed, including the formal adoption of the 5-tier classification system, the recommendation to uncouple the concept of variant classification from clinical interpretation, and the incorporation of a quantitative, evidence-based evaluation framework for copy number gains and losses.

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Erin Rooney Riggs, MS, CGC, is an Assistant Professor in the Autism & Developmental Medicine Institute at Geisinger, and is co-chair of the Education working group within the Clinical Genome Resource (ClinGen).  Her research interests include developing standards for gene and variant curation, with a particular focus on copy number variation.  She received her Masters in Genetic Counseling from Northwestern University, and previously worked at Emory University as a clinical genetic counselor specializing in general pediatrics and lysosomal storage disease.​


Selvi Palaniappan is a certified genetic counselor and Oncology Genetic Specialist at Ambry Genetics. Prior to gaining her M.S. in Genetic Counseling from University of California, Irvine, Selvi was a researcher at the Howard Hughes Medical Institute at University of Michigan. She joined Ambry after more than 20 years of working clinically at Emory University, Vanderbilt Ingram Cancer Center, and most recently, developing a cancer genetics program at Northside Hospital in Atlanta, Georgia.

  • Fri, March 15, 2019
  • 12:00pm PDT
  • Duration: 1 hour
  • C.E.U.
    1 Category 1 Contact Hour
  • P.A.C.E. 1 unit

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