Hinchey Classification of
Acute Diverticulitis

• Stage 1a:   phlegmon

• Stage 1b:  diverticulitis with pericolic or mesenteric abscess

• Stage 2:   diverticulitis with walled off pelvic abscess

• Stage 3:   diverticulitis with generalized purulent peritonitis

• Stage 4:   diverticulitis with generalized fecal peritonitis

New England Journal Article on Diverticulitis 11/15/07