This is most common in jejunal atresia. Occasionally, there may be jaundice, which is most common in jejunal atresia. Dorsal mesentery, of the jejunal and ileal loops, forms the mesentery proper. The arcades are anastomoses of the jejunal and ileal arteries, branches of superior mesenteric artery. It compares well to jejunal aspirates in making the diagnosis of bacterial overgrowth. The tube may be used for Jejunal feedings and for administrating potassium, antibiotics or vitamins. Jejunal, duodenal mucosa or Brunner's tissue were each found in 2% of ectopic cases. However, there are a few jejunal lymph nodes suspended in its mesentery. First, the gold standard method for detection of SIBO is jejunal aspirates.