The Application of Montreal Classification in Different Clinical and Serological IBD Subtypes

Hepatogastroenterology. Jul-Aug 2010;57(101):787-93.


Background/aims: Inflammatory bowel disease (IBD) represents the heterogeneous group of disorders with a wide variety of clinical manifestations. The Montreal classification has been developed recently and its accuracy in categorizing of IBD phenotypes needs to be investigated. The aim of the study was to assess the usefulness of the Montreal classification compared to CAI and CDAI in various disease activity, serological and clinical manifestations of IBD.

Methodology: The study was performed in 125 IBD patients: 71 patients with ulcerative colitis, 31 with Crohn's disease and 23 with IBD unclassified (indeterminate colitis). Disease activity and clinical course were assessed using Montreal classification, Clinical Activity Index and Crohn's Disease Activity Index. pANCA and ASCA were measured with ELISA, using widely used, commercial antibody panel (Cogent Diagnostics and Genesis Diagnostics and MedTek kits).

Results: No significant correlation has been found between pANCA/ASCA presence and disease activity using CAI and CDAI. ASCA and pANCA-/ASCA+ antibodies pattern had been detected more often in patients with Crohn's disease after surgery, with localization in small or small and large intestine, without perianal lesions and with early disease onset.

Conclusions: Correlations between serotype and certain clinical phenotype are present, which could potentially be of value in the classification of patients particular treatment regimen. We have noticed that clinical course assessment using Montreal classification shows precisely real CD patients state.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Antibodies / analysis
  • Antibodies, Antineutrophil Cytoplasmic / analysis
  • Body Mass Index
  • Colitis, Ulcerative / classification
  • Crohn Disease / classification
  • Female
  • Humans
  • Inflammatory Bowel Diseases / classification*
  • Inflammatory Bowel Diseases / immunology
  • Male
  • Middle Aged
  • Phenotype
  • Saccharomyces cerevisiae / immunology
  • Severity of Illness Index*


  • Antibodies
  • Antibodies, Antineutrophil Cytoplasmic