In a peptic ulcer it is believed to be a result of edema and scarring of the ulcer, followed by healing and fibrosis, which leads to obstruction of the gastroduodenal junction (usually an ulcer in the first part of the duodenum).
Gastric outlet obstruction
Esophageal food bolus obstruction
Esophagogastric dissociation
Esophagogastric junction outflow obstruction
Gastric volvulus
Inspissation
Exocrine pancreatic insufficiency
Sphincter of Oddi dysfunction