PreprintArticleVersion 1This version is not peer-reviewed
Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database
Version 1
: Received: 1 November 2024 / Approved: 4 November 2024 / Online: 4 November 2024 (17:13:43 CET)
How to cite:
Suzuki, S.; Saito, Y. Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database. Preprints2024, 2024110223. https://doi.org/10.20944/preprints202411.0223.v1
Suzuki, S.; Saito, Y. Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database. Preprints 2024, 2024110223. https://doi.org/10.20944/preprints202411.0223.v1
Suzuki, S.; Saito, Y. Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database. Preprints2024, 2024110223. https://doi.org/10.20944/preprints202411.0223.v1
APA Style
Suzuki, S., & Saito, Y. (2024). Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database. Preprints. https://doi.org/10.20944/preprints202411.0223.v1
Chicago/Turabian Style
Suzuki, S. and Yosuke Saito. 2024 "Genomic Analysis of Advanced Phyllodes Tumors Using Next-Generation Sequencing and Their Chemotherapy Response: A Retrospective Study Using the C-CAT Database" Preprints. https://doi.org/10.20944/preprints202411.0223.v1
Abstract
Abstract: Background and Objectives: Phyllodes tumors are rare breast neoplasms with limited therapeutic options and poorly understood molecular characteristics. This study aimed to analyze genomic alterations and treatment outcomes in advanced phyllodes tumors using Japan's national clinical genomic testing registry (C-CAT database) to identify potential therapeutic targets and predictive markers. Materials and Methods: We conducted a retrospective analysis of 60 phyllodes tumor cases from 80,329 patients registered in the C-CAT database between June 2019 and August 2024. Comprehensive genomic profiling was performed using multiple platforms including FoundationOne CDx, NCC OncoPanel, and other approved tests. Treatment responses were evaluated according to RECIST criteria, and pathogenic variants were assessed using established databases including ClinVar and OncoKB. Results: The cohort's median age was 54 years (range: 13-79), with TERT promoter variants (70%), MED12 (52%), and TP53 (50%) mutations being the most frequent alterations. Forty patients received first-line chemotherapy, predominantly an-thracycline-based regimens (n=29). Although not reaching statistical significance, cases with CDKN2A and TERT alterations showed trends toward treatment resistance (OR>3.0). One patient with high tumor mutational burden (37/Mb) responded to pembrolizumab. Potential germline variants were identified in two cases (3.3%), involving MSH6 and TP53 alterations. Notably, no cases with CDKN2B alterations demonstrated treatment response (p=0.09). Conclusions: Our findings suggest distinct molecular patterns in phyllodes tumors compared to other soft tissue sarcomas, with potential implications for treatment selection. The identification of specific genetic alterations associated with treatment resistance may guide therapeutic decision-making, while the presence of actionable mutations in select cases indicates potential opportunities for targeted therapy approaches.
Keywords
Phyllodes Tumor; Genomic Testing; Chemotherapy
Subject
Medicine and Pharmacology, Oncology and Oncogenics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
