Richter supraumbilical hernia managed with invagination: a case report

Introduction and importance: Richter's hernia is an incarceration of the anti-mesenteric border of a segment of bowel through an abdominal wall defect. It primarily affects elderly individuals but can occur at any age, with a slightly increased incidence in females. The increase in laparoscopic and robotic-assisted procedures has led to a rise in Richter's hernias.

Case presentation: A 40-year-old male with a history of laparoscopic cholecystectomy and kidney transplantation presented with a 4-day history of supraumbilical swelling and abdominal pain. The swelling was irreducible and accompanied by mild tenderness, and local signs of inflammation were exhibited. Intraoperatively, a 1.5 cm hernia defect was found, with the sac containing omentum and a portion of bowel segment for which invagination with serosal closure with the Mayo double-breasting technique was done.

Clinical discussion: Richter's hernia presents with abdominal discomfort, bloating, nausea, and vomiting, with a notable feature being the delayed onset of symptoms due to its partial involvement of the bowel wall. Diagnosis can be achieved through a computed tomography (CT) scan or intraoperative exploration. Management of Richter hernia is contingent upon the patient's clinical condition, physical examination, and suspicion of strangulation.

Conclusion: Diagnosis of Richter's hernia demands higher suspicion, particularly in patients with predisposing factors like a history of minimally invasive surgery. Prompt surgical intervention is crucial for reducing mortality and enhancing prognosis, with invagination alone being adequate if ischaemia is confined and mesh placement is unnecessary.