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Table 1 Hinchey stage for diverticulitis.

From: The Sigma-trial protocol: a prospective double-blind multi-centre comparison of laparoscopic versus open elective sigmoid resection in patients with symptomatic diverticulitis

I

Acute phlegmonous diverticulitis without complications

II

Diverticulitis with parcolic abscess without perforation

III

Diffuse purulent peritonitis

IV

Diffuse faecal peritonitis