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Table 1 Hinchey classification and modified Hinchey classification of acute diverticulitis [10, 12]

From: A multicenter randomized clinical trial investigating the cost-effectiveness of treatment strategies with or without antibiotics for uncomplicated acute diverticulitis (DIABOLO trial)

Hinchey Modified Hinchey
  0 Mild clinical diverticulitis
I Pericolic abscess or phlegmon 1a Colonic wall thickening/Confined pericoloc inflammation
  Ib Confined small (< 5 cm) pericolic abscess
II Pelvic, intraabdominal, or retroperitoneal abscess II Pelvic, distant intraabdominal, or retroperitoneal abscess
III Generalized purulent peritonitis III Generalized purulent peritonitis
IV Generalized fecal peritonitis IV Fecal peritonitis