Microscopic esophagitis distinguishes patients with non-erosive reflux disease from those with functional heartburn.

Journal of Gastroenterology
Edoardo SavarinoV Savarino

Abstract

Microscopic esophagitis (ME) is common in patients with non-erosive reflux disease (NERD), and dilation of intercellular spaces (DIS) has been regarded as the potential main mechanism of symptom generation. We aimed to compare these histological abnormalities in healthy volunteers (HVs) and patients with erosive esophagitis (EE), NERD, and functional heartburn (FH). Consecutive patients with heartburn prospectively underwent upper endoscopy and impedance-pH off-therapy. Twenty EE patients and fifty-seven endoscopy-negative patients (NERD), subclassified as 22 with pH-POS (positive for abnormal acid exposure), 20 with hypersensitive esophagus (HE; normal acid/symptom association probability [SAP]+ or symptom index [SI]+), and 15 with FH (normal acid/SAP-/SI-/ proton pump inhibitor [PPI] test-), were enrolled. Twenty HVs were also included. In each patient/control, multiple specimens (n = 5) were taken from the distal esophagus and histological alterations were evaluated. ME was diagnosed when the global histological score was >0.35. The prevalence of ME was higher (p < 0.0001) in EE (95 %), pH-POS (77 %), and HE (65 %) NERD patients than in FH patients (13 %) and HVs (15 %). Also, basal cell hyperplasia (p < 0.0023), DIS (p < 0....Continue Reading

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