41. The adult worms might have been coughed up and reswallowed before settling in the duodenum . 42. Bile is secreted into the duodenum of the small intestine via the common bile duct. 43. Lundh's test involves placing a tube with multiple channels in to the duodenum . 44. Involvement of the duodenum and jejunum can impair the absorption of many other nutrients including folate. 45. The pancreas is located in the abdominal cavity, close to the stomach and the duodenum . 46. Generally, there are multiple lesions located mainly in the stomach and occasionally in the duodenum . 47. The pancreatic duct and common bile duct enter the descending duodenum , through the major duodenal papilla. 48. It is usually found in the duodenum , although it may arise in the stomach or pancreas. 49. Occasionally, there may be a large acute ulcer in the duodenum ( Curling s ulcer ). 50. Some of the bile drains directly into the duodenum , and some is stored in the gallbladder.