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  • Title: Effect of proton pump inhibitor on esophageal eosinophilia.
    Author: Schroeder S, Capocelli KE, Masterson JC, Harris R, Protheroe C, Lee JJ, Furuta GT.
    Journal: J Pediatr Gastroenterol Nutr; 2013 Feb; 56(2):166-72. PubMed ID: 23325438.
    Abstract:
    OBJECTIVE: Differentiation between the common etiologies of dense esophageal eosinophilia such as gastroesophageal reflux disease (GERD) and eosinophilic esophagitis can be difficult. We hypothesized that histologic features may provide diagnostic clues concerning the etiology of esophageal eosinophilia. METHODS: : We performed a retrospective chart review of 204 children with the diagnosis of esophagitis characterized by ≥ 15 eosinophils (eos) per high-power field (HPF) in at least 1 biopsy. We then restricted our analysis to subjects who had received at least 8 weeks of only proton pump inhibitors (PPIs) followed by endoscopy and who had a clinicopathologic response to this treatment. Symptoms, endoscopic findings, and pathologic descriptions were reviewed and an eosinophil peroxidase (EPX) index was determined to assess for degranulation/eosinophil activation. RESULTS: Of the 204 identified charts, 7 subjects identified met the inclusion criteria. Five of these 7 patients showed a clinicopathologic response to PPIs after their follow-up endoscopy, (mean peak eosinophil count: 92 vs 5 eos/HPF, and EPX index: 39.2 vs 14.6, pre- and posttreatment, respectively). Two patients experienced initial resolution of symptoms and esophageal eosinophilia with PPI therapy; however, within 17-23 months they redeveloped symptoms and esophageal eosinophilia while receiving PPI therapy at the time of a third endoscopy (mean peak eosinophil count: 40 vs 11 vs 36 eos/HPF, and EPX index: 44 vs 21 vs 36.5, pre-, post- and posttreatment, respectively). No clinicopathologic features or degranulation patterns differentiated subjects with GERD/PPI responsive esophageal eosinophilia from those who had transient response to PPI treatment. CONCLUSIONS: No clinicopathologic features differentiated subjects who responded to PPI treatment. PPI treatment can be helpful to exclude GERD and PPI responsive esophageal eosinophilia but long-term follow-up is critical in the management of esophagitis.
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