Beware of spontaneous reduction "en masse" of inguinal hernia.

Reduction 'en masse' of inguinal hernia is a rare entity defined as manual reduction of an external hernia sac back through the abdominal wall but where its content still remains incarcerated or strangulated into a displaced position, most often in the pre-peritoneal space. Small bowel obstruction habitually follows requiring urgent repair, preferentially via a trans-abdominal approach. Pre-operative clinical diagnosis is difficult and abdominal CT-scan imaging is the investigation of choice.