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• W2792269771 abstract "153 Background: Tumor mutation profiling has changed the prognostication and treatment of a wide variety of malignances. However, little is known about whether mutation profiles affect outcome in localized esophageal cancer treated with multimodality therapy. SMAD4 is a gene involved in the regulation of the TGF-β signal transduction pathway by negatively controlling the growth of epithelial cells and has been implicated as a prognostic factor in pancreatic cancer. We undertook an exploratory analysis of tumor mutation profiles, including SMAD4 status, in localized esophageal cancer patients treated with trimodality therapy at our institution. Methods: We identified 66 Stage II-III esophageal cancer patients treated with chemoradiation followed by surgery who had some form of tumor mutation profiling available. Only patients with mutation profiling from pre-treatment biopsy or post-chemoradiation surgical specimen (i.e. not from a subsequent metastatic lesion) were included. Twenty-two patients underwent next-generation sequencing assessing 341 candidate genes via targeted sequencing. Log-rank test was used to assess correlation of mutations to overall survival, and to pathologic response. Results: The median follow-up was 17.1 months. SMAD4 loss was identified in 3 of 22 patients (13.6%) who underwent next-generation sequencing, and was significantly associated with inferior overall survival (p=0.023). No other candidate genes were significantly associated with survival, and no genes were significantly associated with pathologic response. Conclusions: To our knowledge, this is the first analysis of next-generation mutation profiling and outcome in non-metastatic esophageal cancer patients treated with trimodality therapy. Due to the limited numbers, this was an exploratory analysis only. We identified SMAD4 loss as a potential adverse prognostic factor for survival. More next-generation sequencing data from non-metastatic esophageal cancer patients treated with multimodality therapy is needed to further elucidate the potential relationship of SMAD4 loss or other mutations with outcome." @default.
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• W2792269771 date "2018-02-01" @default.
• W2792269771 modified "2023-09-26" @default.
• W2792269771 title "Next-generation sequencing to identify predictors of survival after trimodality therapy for esophageal cancer." @default.
• W2792269771 doi "https://doi.org/10.1200/jco.2018.36.4_suppl.153" @default.
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