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WGTA was used to generate reports including molecular alterations and site\/tissue of origin prediction. Two reviewers analyzed genomic reports, clinical history, and tumor pathology. We used National Comprehensive Cancer Network (NCCN) consensus guidelines, Food and Drug Administration (FDA) approvals, and provincially reimbursed treatments to define genomic biomarkers associated with approved targeted therapeutic options (TTOs). Tumor tissue\/site of origin was reassessed for most cases using genomic analysis, including a machine learning algorithm (Supervised Cancer Origin Prediction Using Expression [SCOPE]) trained on The Cancer Genome Atlas data. WGTA was performed on 652 cases, including a range of primary tumor types\/tumor sites and 15 malignant tumors of uncertain histogenesis (MTUH). At the time WGTA was performed, alterations associated with an approved TTO were identified in 39 (6%) cases; 3 of these were not identified through routine pathology workup. In seven (1%) cases, the pathology workup either failed, was not performed, or gave a different result from the WGTA. Approved TTOs identified by WGTA increased to 103 (16%) when applying 2021 guidelines. The histopathologic diagnosis was reviewed in 389 cases and agreed with the diagnostic consensus after WGTA in 94% of non\u2010MTUH cases (<jats:italic>n<\/jats:italic>\u00a0=\u2009374). The remainder included situations where the morphologic diagnosis was changed based on WGTA and clinical data (0.5%), or where the WGTA was non\u2010contributory (5%). The 15 MTUH were all diagnosed as specific tumor types by WGTA. Tumor board reviews including WGTA agreed with almost all initial predictive molecular profile and histopathologic diagnoses. WGTA was a powerful tool to assign site\/tissue of origin in MTUH. Current efforts focus on improving therapeutic predictive power and decreasing cost to enhance use of WGTA data as a routine clinical test.<\/jats:p>","DOI":"10.1002\/cjp2.265","type":"journal-article","created":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T03:38:51Z","timestamp":1646710731000},"page":"395-407","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["The impact of whole genome and transcriptome analysis (<scp>WGTA<\/scp>) on predictive biomarker discovery and diagnostic accuracy of advanced malignancies"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8739-3879","authenticated-orcid":false,"given":"Basile","family":"Tessier\u2010Cloutier","sequence":"first","affiliation":[{"name":"Department of Pathology and Laboratory Medicine University of British Columbia  Vancouver BC Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jasleen 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