Background <p>Richter hernia is a rare but potentially life-threatening subtype of abdominal hernia, characterized by strangulation of only part of the bowel wall, often without signs of obstruction. While its iatrogenic form (e.g., port-site hernia) has gained attention in the laparoscopic era, the burden of <i>sporadic</i> (non-iatrogenic) Richter hernia remains poorly characterized in the surgical literature.</p> Methods <p>A systematic review was conducted following PRISMA 2020 guidelines across PubMed, Scopus, and Web of Science to identify English-language reports published between January 2000 and May 2025. Eligible studies included case reports, case series, and retrospective cohorts reporting surgical management and outcomes in non-iatrogenic Richter hernia. The primary outcomes were the need for bowel resection and the incidence of bowel perforation. A random-effects meta-analysis was performed for pooled proportions.</p> Results <p>A total of 14 studies reporting on 39 patients met the inclusion criteria. The pooled proportion of patients undergoing bowel resection was 66.5% (95% CI: 48.1%–81.0%), while the pooled incidence of bowel perforation was 28.6% (95% CI: 15.0%–47.7%). Most patients underwent open surgery; laparoscopic approaches were rarely employed. Delayed diagnosis contributed significantly to the need for resection and the risk of perforation.</p> Conclusion <p>Sporadic Richter hernia is associated with a high rate of bowel resection and a substantial risk of perforation, often due to delayed recognition. Awareness of its subtle clinical presentation is critical for timely surgical intervention. These findings underscore the importance of early diagnosis and exploration, even in the absence of overt bowel obstruction.</p>

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Understanding the Surgical Burden of Sporadic Richter Hernia: A Systematic Review of Reported Cases from 2000 to 2025

  • Umut İhsan Emreol

摘要

Background

Richter hernia is a rare but potentially life-threatening subtype of abdominal hernia, characterized by strangulation of only part of the bowel wall, often without signs of obstruction. While its iatrogenic form (e.g., port-site hernia) has gained attention in the laparoscopic era, the burden of sporadic (non-iatrogenic) Richter hernia remains poorly characterized in the surgical literature.

Methods

A systematic review was conducted following PRISMA 2020 guidelines across PubMed, Scopus, and Web of Science to identify English-language reports published between January 2000 and May 2025. Eligible studies included case reports, case series, and retrospective cohorts reporting surgical management and outcomes in non-iatrogenic Richter hernia. The primary outcomes were the need for bowel resection and the incidence of bowel perforation. A random-effects meta-analysis was performed for pooled proportions.

Results

A total of 14 studies reporting on 39 patients met the inclusion criteria. The pooled proportion of patients undergoing bowel resection was 66.5% (95% CI: 48.1%–81.0%), while the pooled incidence of bowel perforation was 28.6% (95% CI: 15.0%–47.7%). Most patients underwent open surgery; laparoscopic approaches were rarely employed. Delayed diagnosis contributed significantly to the need for resection and the risk of perforation.

Conclusion

Sporadic Richter hernia is associated with a high rate of bowel resection and a substantial risk of perforation, often due to delayed recognition. Awareness of its subtle clinical presentation is critical for timely surgical intervention. These findings underscore the importance of early diagnosis and exploration, even in the absence of overt bowel obstruction.