An insidious internal hernia 30 years after jejunoileal bypass: a case report

Jejunoileal bypass (JIB) was an early bariatric procedure that involved bypassing most of the small bowel resulting in malabsorption and weight loss. Due to serious complications associated with the procedure, JIB was largely discontinued by the mid-1980s. We report the case of a 77-year-old woman with a history of JIB 31 years earlier. In 2022, she was hospitalized for acute abdominal pain. A computed tomography (CT) scan revealed a suspicion of internal hernia (IH) with a typical swirl sign. Due to the quick relief of symptoms an emergency surgery was not considered at the time. Nevertheless, a subsequent operation revealed a large mesenteric defect, adhesions and 100 cm of effective small bowel left. Although the procedure is no longer performed, some patients with JIB are still alive and develop late complications. To our knowledge, this is the first case report describing an IH in a patient who has undergone JIB.