Proficiency testing of standardized samples shows very high interlaboratory agreement for clinical next-generation sequencing-based oncology assays

Jason D. Merker*, Kelly Devereaux, A. John Iafrate, Suzanne Kamel-Reid, Annette S. Kim, Joel T. Moncur, Stephen B. Montgomery, Rakesh Nagarajan, Bryce P. Portier, Mark J. Routbort, Craig Smail, Lea F. Surrey, Patricia Vasalos, Alexander J. Lazar, Neal I. Lindeman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Context.-Next-generation sequencing-based assays are being increasingly used in the clinical setting for the detection of somatic variants in solid tumors, but limited data are available regarding the interlaboratory performance of these assays. Objective.-To examine proficiency testing data from the initial College of American Pathologists (CAP) Next-Generation Sequencing Solid Tumor survey to report on laboratory performance. Design.-CAP proficiency testing results from 111 laboratories were analyzed for accuracy and associated assay performance characteristics. Results.-The overall accuracy observed for all variants was 98.3%. Rare false-negative results could not be attributed to sequencing platform, selection method, or other assay characteristics. The median and average of the variant allele fractions reported by the laboratories were within 10% of those orthogonally determined by digital polymerase chain reaction for each variant. The median coverage reported at the variant sites ranged from 1922 to 3297. Conclusions.-Laboratories demonstrated an overall accuracy of greater than 98% with high specificity when examining 10 clinically relevant somatic single-nucleotide variants with a variant allele fraction of 15% or greater. These initial data suggest excellent performance, but further ongoing studies are needed to evaluate the performance of lower variant allele fractions and additional variant types.

Original languageEnglish
Pages (from-to)463-471
Number of pages9
JournalArchives of Pathology and Laboratory Medicine
Volume143
Issue number4
DOIs
StatePublished - Apr 2019
Externally publishedYes

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