Esophagitis and its causes: Who is “guilty” when acid is found “not guilty”?

Figure 3 Drug-induced esophageal damage. Endoscopic view of a patient with a history of NSAIDS use. In this case two ulcers are visible, located in the middle third of the esophagus. Also in this case, as well as for Crohn’s disease, the proximal localization makes the possibility of gastroesophageal reflux disease unlikely.