Original Article
Copyright ©2013 Baishideng Publishing Group Co.
World J Gastroenterol. Aug 14, 2013; 19(30): 4877-4886
Published online Aug 14, 2013. doi: 10.3748/wjg.v19.i30.4877
Table 2 Montreal classification of inflammatory bowel disease
IBDMontreal classification
Crohn disease
Age of diagnosisA1 below 16 yr
A2 between 17 and 40 yr
A3 above 40 yr
LocationL1 ileal
L2 colonic
L3 ileocolonic
L4 isolated upper disease
BehaviourB1 non-stricturing, non-penetrating
B2 stricturing
B3 penetrating
P perianal disease
Ulcerative colitis
Ulcerative proctitis (distal to the rectosigmoid junction)
Left sided UC (distal to the splenic flexure)
Extensive UC (proximal to the splenic flexure)
Clinical remission (asymptomatic)
Mild UC: Passage of four or fewer stools/d with or without blood, absence of any systemic illness, and normal inflammatory markers
Moderate UC: Passage of more than four stools per day but with minimal signs of systemic toxicity
Severe UC: Passage of at least six bloody stools daily, pulse rate of at least 90 beats/min, temperature of at least 37.5 °C, haemoglobin of less than 10.5 g/100 mL, and ESR of at least 30 mm/h