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- W3135865727 abstract "491 Background: Both urinary and blood cell-free DNA (cfDNA) have been implicated in noninvasive detection and surveillance of urothelial bladder cancer (UBC). However, a direct comparison of their diagnostic performance in the real-world setting is lacking. Methods: 59 eligible cases with pathologically confirmed disease and accompanying tissue/urine pairs were prospectively enrolled and consented to Institutional Review Board-approved protocols. Baseline peripheral blood mononuclear cell (PBMC) and plasma specimens were collected during clinic visit. The 180-gene Predicine liquid biopsy assay was applied for ultra-deep targeted sequencing and somatic alteration identification in tumor tissue-based DNA (tDNA), urinary cfDNA (ucfDNA) and blood cfDNA (bcfDNA). Results: The 59 studied subjects constituted a natural UBC cohort of non-muscle invasive bladder cancer (NMIBC) and muscle invasive bladder cancer (MIBC), including 48 (81.4%) NMIBC and 42 (71.2%) male patients. Diverse quantitative metrics such as VAF (variant allele frequency) and TMB (tumor mutational burden) were invariably concordant between tDNA and ucfDNA, but not bcfDNA. The mutational landscape captured by tDNA or ucfDNA highly resembled each other and mirrored previously described genomic panorama of UBC, whereas a significant proportion of bcfDNA aberrations stemmed from clonal hematopoiesis. Using tDNA-informed variants as the ground truth, ucfDNA assays achieved a specificity of 99.3%, a sensitivity of 86.7%, a positive predictive value (PPV) of 67.2%, a negative predictive value (NPV) of 99.8%, and a diagnostic accuracy of 99.1%, which were generally lower in the case of bcfDNA analysis. Conclusions: Urine-based molecular pathology provides valid and complete genetic information about neoplastic lesions, and represents a faithful surrogate for genotyping and monitoring UBC." @default.
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- W3135865727 date "2021-02-20" @default.
- W3135865727 modified "2023-09-27" @default.
- W3135865727 title "Superior molecular pathology of urothelial bladder cancer using urinary cell-free DNA." @default.
- W3135865727 doi "https://doi.org/10.1200/jco.2021.39.6_suppl.491" @default.
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