Gastric erosions and ulcerations located at or near the neck of diaphragmatic hernias are referred to as Cameron erosions or ulcerations. Identification of these lesions requires a thorough endoscopic examination of the hernia sac and the gastric mucosa on the underside of the diaphragmatic aperture. These lesions should be considered in any patient in whom a hiatal hernia is noted. These lesions can be solitary or multiple and can present as acute or chronic gastrointestinal bleeding or simply as an incidental finding. Concomitant acid-peptic disease is frequently found. Treatment is primarily medical but surgical intervention is necessary in certain circumstances.