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- W4282933964 abstract "Abstract Background: Presence of liver metastasis is associated with a poor prognosis in mUC. According to the prognostic model by Sonpavde et. al, post platinum treated mUC pts with liver metastasis had a 50% higher risk of death on immunotherapy compared to pts without liver metastasis (PMID 32552295). Herein, we hypothesize that pts with liver metastasis harbor a distinct tumor genomic landscape compared to pts without liver metastasis. Methods: In this IRB-approved retrospective study, mUC pts with and without liver metastasis at baseline and available tumor comprehensive genomic profiling (CGP) from a CLIA-certified laboratory were included. Variants of unknown significance and mutated genes present in ≤ 5% of pts were excluded. A Chi-square test was used to compare the frequency of mutated genes between both groups. The p-value was adjusted for false discovery, significance was preset at 0.25. Results: 114 pts were included. 16/114 pts had a liver metastasis. Median age was 69 and 67 years, male/female 12/4 and 72/26, smokers/non-smokers 6/10 and 46/52, for pts with and without liver metastasis respectively. The most frequent genomic alterations (GAs) were seen in TP53, CDKN2B and FGFR3. Pts with liver metastasis had significantly higher GAs in MYC (unadjusted p=0.009, adjusted p=0.24) compared to pts without liver metastasis. The median number of GAs per patient and the tumor mutation burden were not significantly different between groups. Conclusion: Our results indicate GAs in MYC are significantly enriched in pts with liver metastasis compared to those without liver metastasis. These hypothesis generating data require external validation. Genes Liver Metastasis: N=16 Non-Liver Metastasis: N=98 Adjusted P-value MYC 3(18.8%) 3(3.1%) 0.24 ERBB3 3(18.8%) 5(5.1%) 0.62 FGFR3 5(31.2%) 16(16.3%) 0.73 RICTOR 2(12.5%) 4(4.1%) 0.73 TP53 7(43.8%) 58(59.2%) 0.73 ERBB2 3(18.8%) 9(9.2%) 0.73 CDKN2B 7(43.8%) 31(31.6%) 0.73 ARID1A 3(18.8%) 21(21.4%) 0.90 RB1 3(18.8%) 24(24.5%) 0.90 KDM6A 2(12.5%) 19(19.4%) 0.90 Citation Format: Nishita Tripathi, Yeonjung Jo, Nicolas Sayegh, Beverly Chigarira, Blake Nordblad, Vinay Mathew Thomas, Benjamin Haaland, Roberto Nussenzveig, Sumati Gupta, Neeraj Agarwal, Umang Swami, Benjamin L. Maughan. Tumor genomic landscape in patients (pts) with and without liver metastasis in metastatic urothelial carcinoma (mUC) [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 5995." @default.
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- W4282933964 date "2022-06-15" @default.
- W4282933964 modified "2023-10-07" @default.
- W4282933964 title "Abstract 5995: Tumor genomic landscape in patients (pts) with and without liver metastasis in metastatic urothelial carcinoma (mUC)" @default.
- W4282933964 doi "https://doi.org/10.1158/1538-7445.am2022-5995" @default.
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