Alkali injury to the esophagus

Endoscopic appearance of caustic esophageal injury 24 hours after intentional ingestion of battery fluid (alkali).
(A) Proximal esophagus with superficial ulcers, bleeding, and exudates (grade 2A).
(B) Distal esophagus with circumeferential ulcers and exudates (grade 2B).
(C) Gastric antrum with extensive necrosis and ulceration (grade 3B).
(D) Duodenum with mucosal edema and hyperemia (grade 1).