Comparison of bilateral to unilateral total extra-peritoneal (TEP) inguinal hernia repair: a systematic review and meta-analysis.

Although limited by the observational nature of the included studies, there is no conclusive evidence to suggest a differential burden of morbidity between unilateral and bilateral TEP IH repair. As all included papers are from observational studies only, evidence from all outcomes is at best very low quality. This manuscript thereby highlights a need for randomized controlled trials to be conducted in this area.