Table 3 Köhler and Hansen/Stock classification.

Symptomatic uncomplicated disease

0 Diverticulosis

Recurrent symptomatic disease

I Acute uncomplicated diverticulitis

Complicated disease:

II Acute complicated diverticulitis

Hemorrhage, Abscess, Phlegmon

   a. Phlegmon, peridiverticulitis

Fistula, Perforation, Stricture

   b. Abscess, sealed perforation

Purulent and fecal peritonitis, Small bowel

   c. Free perforation

obstruction due to post-inflammatory adhesions

III Chronic recurrent diverticulitis