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

Figure 2 Esophageal Crohn’s disease. Endoscopic finding in a patient with esophageal localization of Crohn’s disease. Note the apthous erosions and the small ulceration similar to those usually present in the lower gastrointestinal tract. The localization at the middle tract of the esophagus, far from the esophago-gastric junction suggests to rule out the possibility of gastroesophageal reflux disease.