From: WSES-AAST guidelines: management of inflammatory bowel disease in the emergency setting
Age at diagnosis (A) | Location of disease (L) | Behavior of disease (B) |
---|---|---|
A1: ≤16 years A2: 17–40 years A3: >40 years | L1: ileal L2: colonic L3: ileocolonic L4: modifier for upper gastrointestinal tract | B1: non-stricturing/nonpenetrating B2: stricturing B3: penetrating p: modifier for perianal disease |