OBJECTIVE: Parastomal hernia repair is a poorly evidenced area, with uncertainty around the optimum management. There is considerable heterogeneity within the patient cohort, and currently there is no standardization of patient descriptors in the reporting of parastomal hernia repair. The aim of this study was to develop a core descriptor set of key patient characteristics for patients undergoing surgical repair of a parastomal hernia for reporting in all parastomal hernia research.
METHODS: A longlist of descriptors was generated from a review of the existing literature. The longlist was discussed with patients with lived experience of parastomal hernia repair. Colorectal, general and hernia surgeons took part in a three-round international modified Delphi process using a nine-point Likert scale to rank the importance of descriptors. Items meeting predetermined thresholds were included in the final set and discussed and ratified at the consensus meeting.
RESULTS: Seventy seven respondents completed round one, with 23 (29.8%) completing round three. Eighty six descriptors were rated across the three rounds, with 52 descriptors shortlisted. The consensus meeting ratified a final core descriptor set with 19 descriptors across eight domains: anatomy, contamination, disease, previous treatment, risk factors, symptoms, pathway and other hernia.
CONCLUSIONS: The core descriptor set reflects characteristics that are important to surgeons when reporting on parastomal hernia repair. The use of this agreed core descriptor set may aid the reporting of future studies.

OBJECTIVE: To describe and evaluate safety and feasibility of the robotic modified Sugarbaker technique with intraperitoneal underlay mesh (IPUM) for repairing parastomal hernias associated with ileal conduits (ICPSH).
METHODS: This retrospective, single-center cohort study analyzed data from 15 adult patients who underwent robotic ICPSH repair using the modified Sugarbaker IPUM technique between July 2021 and July 2023. The primary endpoints were hernia recurrence rates and 30-day morbidity. Secondary endpoints included length of stay, conversion to open surgery, 30-day readmission, and 30-day reoperation.
RESULTS: The mean patient age was 69.1 years, and 53.3% were female. Most patients (86.6%) had undergone radical cystectomy as the index surgery. The mean operative time was 249 min, with no conversions to open surgery. The 30-day complication rate was 26.7%, and the mean hospital stay was 3.6 days. No hernia recurrences, hydronephrosis, rise in creatinine or distended conduit on imaging suggesting poor drainage were observed during a mean follow-up of 15.2 months.
CONCLUSIONS: The robotic modified Sugarbaker IPUM technique appears safe and feasible for PSH repair in IC patients, with promising short-term outcomes. Further studies with larger cohorts and longer follow-up are needed to confirm its long-term efficacy and establish its role in ICPSH management.

BACKGROUND: This umbrella review aimed to summarize the findings and conclusions of published systematic reviews on the prophylactic role of mesh against parastomal hernias in colorectal surgery.
METHODS: PRISMA-compliant umbrella overview of systematic reviews on the role of mesh in prevention of parastomal hernias was conducted. PubMed and Scopus were searched through November 2023. Main outcomes were efficacy and safety of mesh. Efficacy was assessed by the rates of clinically and radiologically detected hernias and the need for surgical repair, while safety was assessed by the rates of overall complications.
RESULTS: 19 systematic reviews were assessed; 7 included only patients with end colostomy and 12 included patients with either ileostomy or colostomy. The use of mesh significantly reduced the risk of clinically detected parastomal hernias in all reviews except one. Seven reviews reported a significantly lower risk of radiologically detected parastomal hernias with the use of mesh. The pooled hazards ratio of clinically detected and radiologically detected parastomal hernias was 0.33 (95%CI: 0.26-0.41) and 0.55 (95%CI: 0.45-0.68), respectively. Six reviews reported a significant reduction in the need for surgical repair when a mesh was used whereas six reviews found a similar need for hernia repair. The pooled hazards ratio for surgical hernia repair was 0.46 (95%CI: 0.35-0.62). Eight reviews reported similar complications in the two groups. The pooled hazard ratio of complications was 0.81 (95%CI: 0.66-1).
CONCLUSIONS: The use of surgical mesh is likely effective and safe in the prevention of parastomal hernias without an increased risk of overall complications.

OBJECTIVE: To review the safety and efficacy of Lap-re-Do technique in the treatment of large parastomal hernia.
METHODS: We retrospectively analyzed the recurrence and complications of 81 patients with large parastomal hernia who underwent Lap-re-Do technique in Huashan Hospital of Fudan University from May 2010 to December 2019. And the patients should be able to complete follow-up. With such criteria, we included 40 Lap-re-Do Keyhole patients and 41 Lap-re-Do Sugarbaker patients. Observation time was defined as time to recurrence, death, or last nonevent visit.
RESULTS: In large parastomal hernias, Lap-re-Do had a recurrence rate of 25.9% and complication rate of 16.0%, and reoperation rate of 9.9% during the average follow-up time of 41.1 ± 17.8 months. Recurrence rates were 40% (16/40) after Lap-re-Do Keyhole repair and 12.2% (5/41) after Lap-re-Do Sugarbaker repair. Complication rates were 12.5% after Lap-re-Do keyhole and 19.5% after Lap-re-Do Sugarbaker repair Re-operation rates referred to Lap-re-Do keyhole repair were 15% and Lap-re-Do Sugarbaker repair 4.9% during follow-up.The majority of reoperations were indicated by recurrence.
CONCLUSIONS: Large parastomal hernias are still difficult to be treated. Lap-re-Do Sugarbaker is recommended as an appropriate procedure to close the hernia ring, removing the lengthy colostomy, and effectively reduce recurrence and complication rates.

OBJECTIVE: To develop a machine learning-based risk prediction model for postoperative parastomal hernia (PSH) in colorectal cancer patients undergoing permanent colostomy, assisting nurses in identifying high-risk groups and devising preventive care strategies.
METHODS: A case-control study was conducted on 495 colorectal cancer patients who underwent permanent colostomy at the Second Affiliated Hospital of Anhui Medical University from June 2017 to June 2023, with a 1-year follow-up period. Patients were categorized into PSH and non-PSH groups based on PSH occurrence within 1-year post-operation. Data were split into training (70%) and testing (30%) sets. Variable selection was performed using Least Absolute Shrinkage and Selection Operator (LASSO) regression, and binary classification prediction models were established using Logistic Regression (LR), Support Vector Classification (SVC), K Nearest Neighbor (KNN), Random Forest (RF), Light Gradient Boosting Machine (LGBM), and Extreme Gradient Boosting (XgBoost). The binary classification label denoted 1 for PSH occurrence and 0 for no PSH occurrence. Parameters were optimized via 5-fold cross-validation. Model performance was evaluated using Area Under Curve (AUC), specificity, sensitivity, accuracy, positive predictive value, negative predictive value, and F1-score. Clinical utility was evaluated using decision curve analysis (DCA), model explanation was enhanced using shapley additive explanation (SHAP), and model visualization was achieved using a nomogram.
RESULTS: The incidence of PSH within 1 year was 29.1% (144 patients). Among the models tested, the RF model demonstrated the highest discrimination capability with an AUC of 0.888 (95% CI: 0.881-0.935), along with superior specificity, accuracy, sensitivity, and F1 score. It also showed the highest clinical net benefit on the DCA curve. SHAP analysis identified the top 10 influential variables associated with PSH risk: body mass index (BMI), operation duration, history and status of chronic obstructive pulmonary disease (COPD), prealbumin, tumor node metastasis (TNM) staging, stoma site, thickness of rectus abdominis muscle (TRAM), C-reactive protein CRP, american society of anesthesiologists physical status classification (ASA), and stoma diameter. These insights from SHAP plots illustrated how these factors influence individual PSH outcomes. The nomogram was used for model visualization.
CONCLUSIONS: The Random Forest model demonstrated robust predictive performance and clinical relevance in forecasting colonic PSH. This model aids in early identification of high-risk patients and guides preventive care.

BACKGROUND: Literature on a potential relationship between surgeon case volume and intra- or postoperative complications after ventral hernia repair remains scarce.
METHODS: Patients who underwent ventral hernia repair between 2011 and 2023 were selected from the prospectively maintained French Hernia-Club Registry. Outcome variables were: intraoperative events, postoperative general complications, surgical site occurrences, surgical site infections, length of intensive care unit (ICU), and patient-reported scar bulging during follow-up. Surgeons\' annual case volume was categorized as 1-5, 6-50, 51-100, 101-125, and > 125 cases, and its association with outcome volume was evaluated using uni- and multivariable analyses.
RESULTS: Over the study period, 199 titular or temporary members registered 15,332 ventral hernia repairs, including 7869 primary, 6173 incisional, and 212 parastomal hernia repairs. In univariate analysis, surgeons\' annual case volume was significantly related with all the postoperative studied outcomes. After multivariate regression analysis, annual case volume remained significantly associated with intra-operative complications, postoperative general complications and length of ICU stay. A primary repair was independently associated with fewer intra- and post-operative complications.
CONCLUSIONS: In the present multivariable analysis of a large registry on ventral hernia repairs, higher surgeon annual case volume was significantly related with fewer postoperative general complications and a shorter length of stay, but not with fewer surgical site occurrences, nor with less patient-reported scar bulging. Factors in the surgeons\' case mix such as the type of hernia have significant impact on complication rates.

Parastomal hernias are an inevitable consequence of ostomy formation and their repairs remain a challenge to many surgeons. With multiple systems of classification and a multitude of techniques for hernia repair ranging from suture to mesh repair, the literature remains sparse with regards to the optimal method of repair. The authors describe the most commonly adopted techniques, discuss preventative measures, and review the current literature in the context of perioperative outcomes and hernia recurrence.

Parastomal hernias (PSH) are difficult to manage and associated with high rates of postoperative recurrence and complications. Sugarbaker and three-dimensional (3-D) mesh repair are commonly used methods for the surgical treatment of PSH. However, the efficacy and safety of these surgical techniques have not been adequately compared. Patients with PSH who received 3-D mesh or Sugarbaker repair at our center from August 2012 to May 2023 were included. We retrospectively analyzed their demographic data and postoperative outcomes. The primary outcome measure was the recurrence rate at 1-year follow-up. A total of 86 patients were enrolled, involving 53 in the 3-D mesh (62%) group and 33 in the Sugarbaker (38%) group. Most cases (73%) involved were the laparoscopic approach. The recurrence rate at 1-year follow-up was 15% (eight cases) in the 3-D mesh group and 24% (eight cases) in the Sugarbaker group, with no statistical significance (P = 0.29). Additionally, no differences were observed between the 3-D mesh and Sugarbaker groups in the length of hospitalization or in short- and long-term complications. Sugarbaker and 3-D mesh repair have similar clinical efficacy in the surgical treatment of PSH. Further randomized controlled trials are required to confirm these results.Trial registration number.This study was retrospectively registered at clinicaltrials.gov (NCT06077318).

BACKGROUND: This study examines the efficacy of prophylactic mesh implantation during open radical cystectomy with ileal conduit diversion in preventing parastomal hernias (PH). Despite PH being a common complication, prophylactic methods have been underexplored.
METHODS: A pilot, single-center, prospective cohort study was conducted involving five patients undergoing surgery with mesh implantation. Demographic and clinical characteristics were monitored, including the incidence of PH, operation time, blood loss, and hospitalization duration.
RESULTS: During the mean follow-up period of 9.1±3.2 months post-operation, no occurrences of PH were observed in the patient group. Despite the risks associated with implanting foreign material in an area of surgery involving open small intestine, no infectious complications were noted.
CONCLUSIONS: Prophylactic mesh implantation in radical cystectomy with ileal conduit diversion appears to be an effective preventive measure against PH. Further extensive studies are required to definitively confirm the efficacy and safety of mesh use in this context.

OBJECTIVE: To investigate whether preoperative body morphometry analysis can identify patients at risk of parastomal hernia (PH), which is a common complication after radical cystectomy (RC).
METHODS: All patients who underwent RC between 2010 and 2020 with available cross-sectional imaging preoperatively and at 1 and 2 years postoperatively were included. Skeletal muscle mass and total fat mass (FM) were determined from preoperative axial computed tomography images obtained at the level of the L3 vertebral body using Aquarius Intuition software. Sarcopenia and obesity were assigned based on consensus definitions of skeletal muscle index (SMI) and FM index (FMI). PH were graded using both the Moreno-Matias and European Hernia Society criteria. Binary logistic regression and recursive partitioning were used to identify patients at risk of PH. The Kaplan-Meier method with log-rank and Cox proportional hazards models included clinical and image-based parameters to identify predictors of PH-free survival.
RESULTS: A total of 367 patients were included in the final analysis, with 159 (43%) developing a PH. When utilising binary logistic regression, high FMI (odds ratio [OR] 1.63, P < 0.001) and low SMI (OR 0.96, P = 0.039) were primary drivers of risk of PH. A simplified model that only relied upon FMI, SMI, and preoperative albumin improved the classification of patients at risk of PH. On Kaplan-Meier analysis, patients who were obese or obese and sarcopenic had significantly worse PH-free survival (P < 0.001).
CONCLUSIONS: Body morphometry analysis identified FMI and SMI to be the most consistent predictors of PH after RC.