Although environmental factors can play a role in the development of<unk> , genetic factors are responsible for creating tumors. Therefore, many complications of chromosomal damage in the blood lymphocytes can be possible causes. However, the main causes are: * Annular pancreas * Adhesions * Systemic sclerosis * Superior mesenteric artery syndrome * Aneurysm. * Duodenal atresia<unk>  due to its duodenal ganglionitis is an unusual condition,<unk> 's similarity to megacolon and megaesophagus diseases can better explain the most plausible causes of it. In addition, some theories state that<unk>  can be associated with the following causes: post-vagotomy, vitamin deficiency, and collagen diseases.
Megaduodenum
Album graecum
Esophagus
Iberogast
Sphincter of Oddi
Gumma 
Gastric mucosa
Epigastrium