Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cumulative risk of change from B1 to B2/B3 in patients with L2 and L3 at diagnosis. B1, nonstricturing, nonpenetrating disease; B2, stricturing disease; B3, penetrating disease; L2, colon location; L3, ileocolon location; 5-ASA, 5-aminosalicylic acid.
