<unk>  is an uncommon cause of chronic gastrointestinal bleeding or iron deficiency anemia.  The condition is associated with dilated small blood vessels in the antrum, or the last part of the stomach. It is also called watermelon stomach because streaky long red areas that are present in the stomach may resemble the markings on watermelon.
Gastric antral vascular ectasia
Esophageal intramural pseudodiverticulosis
Rectal foreign body
Helicobacter pylori infection
Bleeding esophageal varices
Anomalous pancreaticobiliary junction
Esophageal web
Gastric diverticulum