Perforation (see above)
Hemorrhage
Upper GI Bleeding
Obstruction, due to:
Scarring of gastric outlet
Edema due to active ulcer
Upper GI Bleeding
Scarring of gastric outlet
Edema due to active ulcer
Peptic ulcer disease
Gastroesophageal reflux disease 
Gastritis
Peptic ulcer disease with or without perforation
Gastroesophageal reflux disease
Lower gastrointestinal bleeding
Pancreatitis
Gallbladder disease 