Dumping Syndrome After One Anastomosis Gastric Bypass-A Systematic Review.

One anastomosis gastric bypass (OAGB) is now the third most common metabolic and bariatric surgery around the world, but the impact of different long-term complications such as dumping syndrome (DS) need still to be addressed. This study aims to the incidence of DS after OAGB through a systematic review of published papers on PubMed, and Scopus. Finally, 17 studies included 3420 patients were included. The mean postoperative follow-up was 11.91 ± 1.5 months. The incidence of DS was reported between 9 to 42.9% and 0.5% to 27.8% in studies using the Sigstad dumping score and patients' self-reported DS, respectively. Treatment of DS after OAGB included mainly dietary changes and medications. Up to date, DS seems to be a rare long-term complication after OAGB and revisional/conversional interventions might not be needed. Further time is necessary to reach out about the consequences of OAGB in the future.