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Rusch, Michael; Nakitandwe, Joy; Shurtleff, Sheila; Newman, Scott; Zhang, Zhaojie; Edmonson, Michael N; Parker, Matthew; Jiao, Yuannian; Ma, Xiaotu; Liu, Yanling; Gu, Jiali; Walsh, Michael F; Becksfort, Jared; Thrasher, Andrew; Li, Yongjin; McMurry, James; Hedlund, Erin; Patel, Aman; Easton, John; Yergeau, Donald; Vadodaria, Bhavin; Tatevossian, Ruth G; Raimondi, Susana; Hedges, Dale; Chen, Xiang; Hagiwara, Kohei; McGee, Rose; Robinson, Giles W; Klco, Jeffery M; Gruber, Tanja A; Ellison, David W; Downing, James R; Zhang, Jinghui
Nature communications, 09/2018, Volume: 9, Issue: 1Journal Article
To evaluate the potential of an integrated clinical test to detect diverse classes of somatic and germline mutations relevant to pediatric oncology, we performed three-platform whole-genome (WGS), whole exome (WES) and transcriptome (RNA-Seq) sequencing of tumors and normal tissue from 78 pediatric cancer patients in a CLIA-certified, CAP-accredited laboratory. Our analysis pipeline achieves high accuracy by cross-validating variants between sequencing types, thereby removing the need for confirmatory testing, and facilitates comprehensive reporting in a clinically-relevant timeframe. Three-platform sequencing has a positive predictive value of 97-99, 99, and 91% for somatic SNVs, indels and structural variations, respectively, based on independent experimental verification of 15,225 variants. We report 240 pathogenic variants across all cases, including 84 of 86 known from previous diagnostic testing (98% sensitivity). Combined WES and RNA-Seq, the current standard for precision oncology, achieved only 78% sensitivity. These results emphasize the critical need for incorporating WGS in pediatric oncology testing.
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