<prompt> Answer this question truthfullyWhat does Dieulafoys lesion refer to?  <response>: <reason> Dieulafoys lesion is an uncommon cause of gastric bleeding thought to cause less than 5 of all gastrointestinal bleeds in adults. It was named after French surgeon Paul Georges Dieulafoy, who described this condition in his paper Exulceratio simplex: Leçons 1-3 in 1898. It is also called Caliber-persistent artery or Aneurysm of gastric vessels. However unlike most other aneurysms these are thought to be developmental malformations rather than degenerative changes. 