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- W3148759568 abstract "Abstract Clinical laboratories routinely use formalin-fixed paraffin-embedded (FFPE) tissue or cell block cytology samples in oncology panel sequencing to identify mutations that can predict patient response to targeted therapy. To understand the technical error due to FFPE processing, a robustly characterized normal cell line was used to create FFPE samples with four different pre-tissue processing formalin fixation times. A total of 96 FFPE sections were then distributed to different laboratories for targeted sequencing analysis by four oncopanels, and variants resulting from technical error were identified. Tissue sections that failed more frequently showed low cellularity, lower than recommended library preparation DNA input, or target sequencing depth. Importantly, sections from block surfaces were more likely to show FFPE-specific errors, akin to “edge effects” seen in histology, and the depth of formalin damage was related to fixation time. To assure reliable results, we recommend avoiding the block surface portion and restricting mutation detection to genomic regions of high confidence." @default.
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- W3148759568 date "2021-04-07" @default.
- W3148759568 modified "2023-10-18" @default.
- W3148759568 title "Deep oncopanel sequencing reveals fixation time- and within block position-dependent quality degradation in FFPE processed samples" @default.
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- W3148759568 doi "https://doi.org/10.1101/2021.04.06.438687" @default.
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