<unk>  is a congenital or acquired dilation and elongation of the duodenum with hypertrophy of all layers that presents as a feeling of gastric fullness, abdominal pain, belching, heartburn, and nausea with vomiting sometimes of food eaten 24 hours prior.<unk>  does not let the muscles of the duodenum function properly, the movement of waste material in the intestines gets impaired, which in turn affects digestion and nutrition. This condition is a rare entity in adults, because it may be either primary idiopathic or secondary. The secondary causes include Chagas disease, systematic sclerosis, duodenal stenosis, and visceral myopathy.
Megaduodenum
Album graecum
Esophagus
Iberogast
Sphincter of Oddi
Gumma 
Gastric mucosa
Epigastrium