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Hansen/Stock and Siewert classification
| Hansen/Stock classification [8] | Siewert et al. [9] | |||
|---|---|---|---|---|
| 0 | Diverticulosis | |||
| I | Acute uncomplicated diverticulitis | |||
| II | Acute complicated diverticulitis | |||
| a | Phlegmon, peridiverticulitis | I | Pericolic abscess or phlegmon | |
| b | Abscess, sealed perforation | II | Pelvic, intraabdominal, or retroperitoneal abscess | |
| c | Free perforation | III | Free perforation | |
| III | Chronic recurrent diverticulitis | |||
