The late complications (>30 days) following RYGB and VSG29 30
| Operation | Late complications |
| RYGB | Gastro-jejunal anastomotic marginal ulcer (8%), gastro-jejunal anastomtic stricture (7%), malnutrition of vitamins and minerals (up to 50%), dumping syndrome (up to 50%), gallstones (symptomatic in 2%), internal hernia or small bowel obstruction (4%). |
| VSG | Gastro-oesophageal reflux disease (33%), gastric dilatation, gastric stenosis leading to gastric outlet obstruction (1–4%), gastric leak. |
Prevalence where known is included in brackets.
RYGB, Roux-en-Y gastric bypass; VSG, vertical sleeve gastrectomy.