title: Characterization of the inflammatory infiltrate in peptic oesophagitis.
abstract: BACKGROUND
  The diagnosis of oesophagitis is mainly based on histology, but interpretation of endoscopic biopsies is often difficult. We performed immunohistochemical studies on oesophageal biopsies to see if better characterization of the inflammatory cell infiltrate would improve the accuracy of the histologic diagnosis of gastro-oesophageal reflux disease.
  
  
  METHODS
  The study groups consisted of 40 consecutive children (mean age +/- SD: 79.6 +/- 5l.9 months; 20 boys) with gastro-oesophageal reflux disease and 7 symptomatic children (mean age +/- SD: 52.6 +/- 37.0 months; 3 boys) without gastro-oesophageal reflux disease. All patients underwent upper gastrointestinal endoscopy with oesophageal biopsies. The diagnosis of gastro-oesophageal reflux disease was established by conventional endoscopic and histologic criteria. In each mucosal biopsy specimen, the number of intraepithelial CD3+, CD25+ (IL2 receptor+), ICAM+, HLA-DR+ and mucosal mast cells were determined.
  
  
  RESULTS
  Conventional histology was in close agreement with endoscopic findings (p<0.001) and reflected the clinical score even more than endoscopic findings. Conventional histology significantly correlated with each inflammatory immunohistochemical marker (<0.05 for each), but the markers were not predictive of symptom severity. Immunohistochemical markers were always abnormal in the gastro-oesophageal reflux disease patients, even in the mildest cases of oesophagitis.
  
  
  CONCLUSIONS
  Although there is a good correlation between symptoms and histology, in a subset of patients, immunohistochemical studies appear useful in supporting the histological diagnosis of gastro-oesophageal reflux disease.
authors.affiliation: Department of Paediatrics, Federico II University, Naples, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Tozzi
authors.forename: A
authors.initials: A
authors.lastname: Staiano
authors.forename: F
authors.initials: F
authors.lastname: Paparo
authors.forename: E
authors.initials: E
authors.lastname: Miele
authors.forename: M
authors.initials: M
authors.lastname: Maglio
authors.forename: M
authors.initials: M
authors.lastname: Di Meo
authors.forename: D
authors.initials: D
authors.lastname: Simeone
authors.forename: R
authors.initials: R
authors.lastname: Troncone
mesh_terms: D001706:Biopsy; D017252:CD3 Complex / Q000032:analysis; D016022:Case-Control Studies; D015815:Cell Adhesion Molecules / Q000032:analysis; D002648:Child; D016099:Endoscopy, Gastrointestinal; D004804:Eosinophils / Q000276:immunology; D004942:Esophagitis, Peptic / Q000175:diagnosis / Q000473:pathology*; D004947:Esophagus / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006684:HLA-DR Antigens / Q000032:analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007150:Immunohistochemistry; D008297:Male; D008407:Mast Cells / Q000276:immunology; D015375:Receptors, Interleukin-2 / Q000032:analysis
chemical_list: D017252:CD3 Complex; D015815:Cell Adhesion Molecules; D006684:HLA-DR Antigens; D015375:Receptors, Interleukin-2