Table 6.
Classification systems of PSH
| System | Types | Description |
|---|---|---|
| EHS (radiological and intraoperative) | Type I | PSH defect area ≤ 5 cm without concomitant incisional hernia |
| Type II | PSH defect area ≤ 5 cm with concomitant incisional hernia | |
| Type III | PSH defect area > 5 cm without concomitant incisional hernia | |
| Type IV | PSH defect area > 5 cm with concomitant incisional hernia | |
| Moreno-Matias (radiological) | Type 0 | Normal, peritoneum follows the wall of the bowel forming the stoma with no formation of a sac |
| Type Ia | Bowel forming the colostomy with a sac < 5 cm | |
| Type Ib | Bowel forming the colostomy with a sac > 5 cm | |
| Type II | Sac containing omentum | |
| Type III | Intestinal loop other than the bowel forming the stoma | |
| Devlin (intraoperative) | Type I | Interstitial hernia |
| Type II | Subcutaneous hernia | |
| Type III | Intrastomal hernia | |
| Type IV | Peristomal hernia (stoma prolapse) | |
| Rubin (intraoperative) | Type Ia | True parastomal interstitial hernia |
| Type Ib | True parastomal subcutaneous hernia | |
| Type II | Intrastomal hernia | |
| Type III | Subcutaneous prolapse | |
| Type IV | Pseudohernia (connected with flank insufficiency or denervation) | |
| Gil and Szcepkowski (clinical) | Type I | Isolated small parastomal hernia |
| Type II | Small parastomal hernia with coexisting midline incisional hernia | |
| Type III | Isolated large parastomal hernia | |
| Type IV | Large parastomal hernia with coexisting midline incisional hernia |