Table 1.

Causes of gastric outlet obstruction

Benign	Malignant
Peptic ulcer disease	Gastric cancer
Caustic ingestion	Gastric lymphoma
NSAID induced stricture	Pancreas cancer
Bouveret syndrome	Duodenal cancer
Hypertrophic pyloric stenosis	Cholangiocarcinoma
Iatrogenic	Gallbladder cancer
Post-surgical scar or anastomosis stricture	Metastatic cancer
Endoscopic submucosal dissection
Endoscopic mucosal resection
Inflammatory causes
Crohn’s disease
Pancreatitis
Inflammatory polyps
Infectious causes
Tuberculosis gastroenteritis
CMV gastroenteritis
Infiltrative causes
Eosinophilic gastroenteritis
Amyloidosis

NSAID: Nonsteroidal anti-inflammatory drugs; CMV: Cytomegalovirus.