Table 1 Staging complicated diverticulitis by CT
From: Diverticulitis: a comprehensive review with usual and unusual complications
Stage | Modified Hinchey classification | CT findings |
|---|---|---|
0 | Mild clinical diverticulitis | Diverticulum ± colonic wall thickening |
Ia | Confined pericolonic inflammation/phlegmon | Colonic wall thickening with pericolonic soft tissue changes |
Ib | Pericolonic/mesocolic abscess | Ia changes + pericolonic/mesocolic abscess |
II | Pelvic, distant intraabdominal or retroperitoneal abscess | Ia changes + distant abscess (generally deep in the pelvis or in interloop regions) |
III | Generalized purulent peritonitis | Free gas associated with localized or generalized ascites and possible peritoneal wall thickening |
IV | Generalized fecal peritonitis | Same findings as III |