Abstract 2731: Sylvester Data Portal: Population-level characterization of a diverse clinicogenomic cohort.

Abstract The Sylvester Data Portal (SDP), developed at the University of Miami (UM) Sylvester Comprehensive Cancer Center, is an advanced cloud-based multi-omics platform that streamlines the management of real-world and research data. SDP provides an integrated framework for managing and harmonizing the center’s clinicogenomic data generated by major genomic profiling vendors, including Caris Life Sciences, Foundation Medicine, NeoGenomics and Guardant Health. SDP now supports population-scale analyses that enable comparative studies across Sylvester’s catchment population. To facilitate secure and role-based access to clinical and genomic data, SDP provides three structured interfaces: (1) The Clinical Dashboard, which summarizes aggregated patient demographics and data availability; (2) the Clinical Browser, which supports query and visualization of de-identified subject-level data; and (3) Clinical Collections, which integrate protected health information with next-generation sequencing data under IRB and Data broker approvals. This integrated infrastructure enables standardized and reproducible access to a large, diverse and growing clinicogenomic dataset, supporting translational research and promoting equitable representation in precision oncology. Using this framework, the demographic and molecular profiles of the Sylvester clinicogenomic cohort were systematically evaluated and compared with those of the Cancer Genome Atlas (TCGA). The Sylvester cohort includes over 30,000 samples, almost three times the number of samples reported in TCGA (11,387), and is derived primarily from targeted panel sequencing rather than whole exome sequencing. Notably, close to half of the cases, 45.9%, within this cohort are from patients that self-identify as Hispanic, vs. 3.52% in TCGA, reflecting the distinctive population from the cancer center and contributing to improved genomic representation of an underrepresented group in cancer genomics. Mutational prevalence was also compared, in particular TP53 is more often mutated in the TCGA cohort, 36.99% vs. 26.72%, whereas KRAS mutations are more prevalent in the SDP cohort 7.5% vs. 9.81%. Citation Format: Oliver Mazariegos, Jeronimo Pissinis, Pearl Seo, Marcin Pilarczyk, Lukas Rupprecht, Caty Chung, Franklin Sotolongo, Marcin Blicharz, Piotr Smol, Michal Pyrkosz, Mateusz Jura, Vasileios Stathias, Stephan Schürer. Sylvester Data Portal: Population-level characterization of a diverse clinicogenomic cohort [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2026; Part 1 (Regular Abstracts); 2026 Apr 17-22; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2026;86(7 Suppl):Abstract nr 2731.