Reduction en masse of incarcerated inguinal hernia: A case report

Reduction en masse is a rare diagnosis in which an inguinal hernia is reduced; however, the bowel remains entrapped inside the hernia sac within the preperitoneal space. Although this occurs infrequently, missed diagnosis can significantly affect patient outcomes.

A 73-year-old male presented with obstructive symptoms in the setting of no prior abdominal operations and recently self-reduced inguinal hernia. Diagnosis of reduction en masse of an inguinal hernia was made with history and cross-sectional imaging. The patient remained obstructed following reduction and underwent urgent laparoscopic exploration. The small bowel was reduced from a preperitoneal hernia sac and appeared viable, negating the need for resection. The patient subsequently underwent inguinal hernia repair and was discharged home.

Although rare, clinicians should be aware of the possibility of reduction en masse of herniae as the cause of intestinal obstruction. This case presentation emphasizes the need for thorough history-taking and imaging to assist in diagnosis. When reduction en masse is diagnosed, proceeding urgently to the operating room is critical. When feasible, it is acceptable to start with laparoscopic exploration to free the bowel and assess for viability. Laparoscopic repair is even an option. Timely diagnosis and operative intervention can preserve the bowel.

Reduction en masse of an inguinal hernia is a rare but potentially morbid cause of intestinal obstruction as the incarcerated inguinal hernia is essentially converted to an internal hernia with ongoing risk of bowel strangulation. Knowledge of this rare diagnosis and its associated imaging findings is essential for appropriate and timely intervention.