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• W2015215756 abstract "OBJECTIVES: Mast cells may contribute to the pathogenesis of eosinophilic esophagitis (EoE), but their role in diagnosis is unknown. Our aim was to determine whether tryptase staining of esophageal mast cells differentiates EoE from gastroesophageal reflux disease (GERD) and has utility for diagnosis of EoE. METHODS: We performed a case–control study comparing patients with EoE, defined by consensus guidelines, to GERD patients with eosinophils on esophageal biopsy. Immunohistochemistry was performed with mast cell tryptase. The density (mast cells/mm2) and intensity (0–4 scale) of mast cell staining was compared between groups after masking the diagnosis. Receiver operating characteristic (ROC) curves were constructed, and the area under the curve (AUC) was calculated to assess mast cell staining as both a stand-alone diagnostic test and an adjunctive assay with eosinophil counts. RESULTS: Fifty-four EoE (mean age 24 years; 69% male; mean 146 eosinophils per high-power field (eos/hpf)) and 55 GERD (mean age 34 years; 60% male; mean 20 eos/hpf) patients were analyzed. The maximum epithelial tryptase density was higher in EoE than in GERD (162±87 mast cells/mm2 vs. 67±54;P<0.001). Mast cells were diffusely distributed throughout the biopsy in more EoE than GERD patients (41 vs. 7%;P<0.001). Tryptase density and eosinophil count were only weakly correlated (R2=0.09;P=0.002). The AUC was 0.84 for tryptase staining alone, and 0.96 for the combination of mast cells and eosinophils. CONCLUSIONS: Patients with EoE have higher levels of tryptase-positive mast cells compared with GERD patients, improving the diagnostic value of biopsies beyond eosinophil counts alone. Mast cell tryptase may have utility as a diagnostic assay for EoE." @default.
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• W2015215756 date "2011-02-01" @default.
• W2015215756 modified "2023-10-17" @default.
• W2015215756 title "Tryptase Staining of Mast Cells May Differentiate Eosinophilic Esophagitis from Gastroesophageal Reflux Disease" @default.
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• W2015215756 doi "https://doi.org/10.1038/ajg.2010.412" @default.
• W2015215756 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4372242" @default.
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