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Table 2 Complications of Roux-en-Y gastric bypass

From: Value of contrast-enhanced multidetector computed tomography in imaging of symptomatic patients after laparoscopic Roux-en-Y gastric bypass and laparoscopic sleeve gastrectomy

 Complications and radiographic findingsManagement
Early postoperative (n = 5)Leaks (n = 2): (5.7%); within 2–4 days (Figs. 2 and 3))
Leakage was at the site of gastrojejunal anastomosis
Percutaneous drainage by pigtail catheter and insertion of naso-enteric tube.
Perigastric collection and hematoma (n = 3): (8.6%) within 3–7 days (Fig. 1)The small collection was treated conservatively and the large collection was managed by gastro-jejunostomy
Late postoperative (n = 30)Gatrojujenostomy anastomotic stricture (n = 1)Endoscopic dilation of the stricture
Internal hernia (n = 14) (40%): 2–4 years (Fig. 4)
Altered disposition of loops and anastomosis
Twisting of mesenteric vessels (whirl sign)
Dilated bowel loops with mushroom appearance of the distended loops in the left hypochondrium
Mesenteric fat planes densification
Medical treatment (case 6)
Intestinal obstruction (n = 6) (17%): 2–4 years (Fig. 5)Treated by laparoscopy (case 1)
Intussusception (n = 5) (14.3%): 2–4 years (Fig. 6)( cases 20 and 21)
luminal narrowing (n = 1) (2.8%): 1 year 
Distended bowel and weight gain (n = 2) (5.7%): after 4 years 
Gastroesophageal spasm (n = 1) (2.8%): 9 months