The duodenum is observed with normal mucosa. Acids produce 'coagulative necrosis' with eschar formation at the site of injury. These injuries result in segmental or extensive strictures involving the upper aero-digestive tract. Stomach is more likely to be injured by acids. Acid induce spasm of pyloric musculature, thereby prolonging the contact time with the stomach wall, and produce avariety of gastric deformities like prepyloric stenosis, antral stricture, hour-glass deformity, or contracted small capacity stomach. Injuries to both stomach and esophagus are common, as was seen in almost half of our patients.
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