Impact of Duodenal Stump Reinforcement in Preventing Duodenal Stump Fistula/Leakage After Distal or Total Gastrectomy for Malignant Disease: A Meta-Analysis of Comparative Studies.

: Duodenal stump fistula (DSF) is one of the most feared postoperative complications in gastric cancer surgery. It has a 1.6-5% incidence rate and correlates with potentially high rates of morbidity (75%) and mortality (16-20%). The absence of duodenal stump reinforcement is considered one of the main risk factors. Our meta-analysis aimed to provide updated evidence by comparing DSF rates among patients who underwent distal or total gastrectomy for malignant gastric disease with or without reinforcement of the duodenal stump. : We performed a systematic review following the PRISMA guidelines. PubMed/MEDLINE, Scopus, Web of Science, Embase, and Cochrane Library databases were used to identify articles of interest. Meta-analysis was performed by using RevMan Version 5.4. : The six included comparative studies (19,527 patients: 11,545 reinforcement group versus 7982 control group) covered an approximately 20-year study period (2005-2023). All the studies included were observational in nature. Meta-analysis of pooled results showed that, compared to the control group, the reinforcement group recorded a statistically significant lower DSF rate (OR: 0.32, 95% CI: 0.17, 0.60, = 0.0004). Considering secondary outcomes, no statistically significant differences were identified between the two groups in terms of operative time, EBL, overall postoperative complications, and length of hospital stay. Just major postoperative complications were considerably lower in the reinforcement group compared to the control group (OR: 0.66, 95% CI: 0.43, 0.99, = 0.04). : Duodenal stump reinforcement appears to reduce the rate of DSF after distal or total gastrectomy for malignant gastric disease. Given the significant biases among meta-analyzed studies, our results require careful interpretation. Further randomized, possibly multicenter trials may turn out to be of paramount importance in confirming our results.