Prophylactic retromuscular mesh placement for parastomal hernia prevention: a retrospective cohort study of permanent colostomies and ileostomies.

PURPOSE: Parastomal hernia (PSH) is the most common complication of stoma formation. The safety and efficiency of prophylactically placing mesh to prevent PSH remain controversial. To address this question, we examined the incidence of clinical and radiological PSH when using parastomal prophylactic mesh (PPM). METHODS: We performed a retrospective, single-center, cohort study that included all patients with permanent stoma creation between 2015 and 2018. Patients were divided into two groups according to the utilization of PPM or not. RESULTS: During the study period, 185 patients had a permanent stoma created, 144 with colostomy and 41 with ileostomy. PPM was placed in 79 patients. There was no difference in the need for early surgical reintervention (p = 0.652) or rehospitalization (p = 0.314) for stoma-related complications in patients with mesh as compared with patients without. Similarly, there was no difference in operative time (p = 0.782) or in length of hospital stay (p = 0.806). No patients experienced infection of the mesh or required prosthesis removal. There was a lower incidence rate of PSH with PPM placement in patients with permanent colostomy [adjusted hazard ratio (HR) 0.50 (95% confidence interval 0.28-0.89); p = 0.018]. In contrast, a higher incidence rate of PSH was observed in patients with ileostomy and PPM [adjusted HR 5.92 (95% confidence interval 1.07-32.65); p = 0.041]. CONCLUSION: Parastomal prophylactic mesh placement to prevent PSH is a safe and efficient approach to reduce the incidence of PSH in patients requiring a permanent colostomy. However, mesh may increase the rate of PSH after permanent ileostomy.

The role of radiological classification of parastomal hernia as a predictor of the need for surgical hernia repair: a retrospective cohort study.

PURPOSE: Parastomal hernia (PSH) is a frequent complication of stoma creation during colorectal surgery. Radiological classification systems have been proposed for PSH but are primarily used for research. Our objective was to determine if PSH radiological classification at diagnosis could predict the need for surgical repair during follow-up. METHODS: In this retrospective cohort study, we reviewed 705 postoperative CT scans from 154 patients with permanent stoma creation from 2015 to 2018. Patients were included for analysis if a primary PSH was diagnosed on any exam. PSH were classified according to the European Hernia Society (EHS) and Moreno-Matias (MM) classification systems. RESULTS: The incidence of radiological PSH was 41% (63/154) after a median radiological follow-up of 19.2 months (interquartile range, 10.9-32.9). Surgical repair was required in 17 of 62 patients with a primary PSH. There was no significant correlation between PSH classification and surgical hernia repair for either the EHS (p = 0.56) or MM classification systems (p = 0.35) in a univariate analysis. However, in a multivariate analysis, the type of PSH according to the EHS classification was significantly correlated with PSH repair during follow-up (p = 0.02). Type III PSH were associated with a lower incidence of surgical hernia repair as compared with type I, with a hazard ratio (HR) of 0.01 (95% CI, <0.00-0.20). A similar correlation was not seen using the MM classification (p = 0.10). CONCLUSION: EHS classification of PSH was significant correlated with the need for surgical repair during short-term follow-up. Prospective studies are required to establish a potential role in patient care.