title: Serologic testing for inflammatory bowel disease.
abstract: OBJECTIVE
  To determine the accuracy of anti-neutrophil cytoplasmic antibodies (ANCAs) and anti-Saccharomyces cerevisiae antibodies (ASCA) in distinguishing patients with inflammatory bowel disease from patients with other disorders, seen in a pediatric gastroenterology clinic setting, and in distinguishing ulcerative colitis (UC) from Crohn's disease (CD).
  
  
  METHODS
  Serum samples from 120 children with new or established diagnoses of UC (n = 25) or CD (n = 20) and control children (n = 74) were analyzed in blinded fashion for the presence of IgG ANCAs and IgA and IgG ASCA.
  
  
  RESULTS
  The highest sensitivity for detecting inflammatory bowel disease, 71%, was achieved by using ANCAs and ASCA together. The best test for UC was ANCAs, which had a sensitivity of 80%. However, the ANCA pattern characteristic of UC, perinuclear ANCAs eliminated by DNAse, had a sensitivity of 60%. High-titer ANCAs were specific for UC, whereas ASCA were specific for CD.
  
  
  CONCLUSIONS
  Testing for ANCAs and ASCA together did not achieve sensitivity necessary for population screening. However, ANCAs and ASCA may be helpful in evaluating children suspected of having inflammatory bowel disease and in distinguishing UC from CD.
authors: Center for Pediatric Inflammatory Bowel Diseases, Section of Pediatric Gastroenterology, University of Colorado School of Medicine, Denver, USA.
authors: E J
authors: EJ
authors: Hoffenberg
authors: S
authors: S
authors: Fidanza
authors: A
authors: A
authors: Sauaia
mesh_terms: D000293:Adolescent; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D000908:Antibodies, Fungal / Q000097:blood*; D002648:Child; D003093:Colitis, Ulcerative / Q000097:blood / Q000175:diagnosis*; D003424:Crohn Disease / Q000097:blood / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000097:blood / Q000175:diagnosis*; D008297:Male; D012441:Saccharomyces cerevisiae / Q000276:immunology*; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000379:methods
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D000908:Antibodies, Fungal