Causes of gastric outlet obstruction
| Benign |
| Peptic ulcer disease |
| Nonsteroidal anti-inflammatory drug-associated stricture |
| Caustic ingestion |
| Postsurgical stricture or scarring |
| Acute pancreatitis |
| Pancreatic pseudocyst |
| Annular pancreas and chronic pancreatitis |
| Radiation-induced stricture |
| Bezoar or foreign body |
| Benign tumor (adenoma, lipoma, stromal tumor, carcinoid) |
| Pancreatic heterotopia |
| Crohn disease |
| Eosinophilic gastroenteritis |
| Tuberculosis |
| Adult hypertrophic pyloric stenosis |
| Amyloidosis |
| Bouveret syndrome (gallstone) |
| Ladd band |
| Diaphragmatic hernia |
| Gastric volvulus |
| Percutaneous endoscopic gastrostomy tube migration |
| Malignant |
| Pancreatic cancer, cystic neoplasm |
| Gastric cancer |
| Gallbladder and bile duct cancer |
| Hepatocellular carcinoma |
| Ampullary cancer |
| Duodenal cancer |
| Gastric lymphoma (mucosa-associated lymphoid tissue) |
| Metastatic disease (colon, ovary, breast, lung) |
| Retroperitoneal sarcoma |
| Retroperitoneal lymphadenopathy |
| Gastrointestinal stromal tumor |