Adenocarcinoma of the lower esophagus with Barrett's esophagus or without Barrett's esophagus: differences in patients' survival after preoperative chemoradiation |
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Authors: | P. Cen A. M. Correa J. H. Le D. Maru S. Anandasabapathy Z. Liao W. L. Hofstetter S. G. Swisher R. Komaki W. A. Ross A. Vaporciyan J. A. Ajani |
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Affiliation: | Department of Gastrointestinal Medical Oncology,;Department of Thoracic and Cardiovascular Surgery,;Department of Gastrointestinal Medicine and Nutrition,;Department of Pathology, and;Department of Radiation Oncology at The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA |
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Abstract: | It remains unclear whether the overall survival (OS) of patients with localized esophageal adenocarcinoma (LEA) with Barrett's esophagus (BE) (Barrett's-positive) and those with LEA without BE (Barrett's-negative) following preoperative chemoradiation is different. Based on the published differences in the molecular biology of the two entities, we hypothesized that the two groups will have a different clinical biology (and OS). In this retrospective analysis, all patients with LEA had surgery following preoperative chemoradiation. Apart from age, gender, baseline clinical stage, location, class of cytotoxics, post-therapy stage, and OS, LEAs were divided up into Barrett's-positive and Barrett's-negative groups based on histologic documentation of BE. The Kaplan-Meier and Cox regression analytic methods were used. We analyzed 362 patients with LEA (137 Barrett's-positive and 225 Barrett's-negative). A higher proportion of Barrett's-positive patients had EUST2 cancers (27%) than those with Barrett's-negative cancer (17%). More Barrett's-negative LEAs involved gastroesophageal junction than Barrett's-positive ones ( P = 0.001). The OS was significantly shorter for Barrett's-positive patients than that for Barrett's-negative patients (32 months vs. 51 months; P = 0.04). In a multivariate analysis for OS, Barrett's-positive LEA ( P = 0.006), old age ( P = 0.016), baseline positive nodes ( P = 0.005), more than 2 positive ypN ( P = 0.0001), higher ypT ( P = 0.003), and the use of a taxane (0.04) were the independent prognosticators. Our data demonstrate that the clinical biology (reflected in OS) is less favorable for patients with Barrett's-positive LEA than for patients with Barrett's-negative LEA. Our intriguing findings need confirmation followed by in-depth molecular study to explain these differences. |
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Keywords: | Barrett's carcinoma chemoradiation-resistance esophageal cancer metastatic potential therapy outcome |
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