PMC4702044_01
Middle third of Esophagus
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F1
This revealed an erythematous oral cavity with some aphthous ulcers, and grade 2B of caustic burn in esophagus (Figure 1).
Antrum
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F2
The stomach revealed grade 2 diffuse caustic mucosal injury of the antrum and pylorus characterized by superficial erosions with exudates and edema (Figure 2).
Pyloric stenosis after one month
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F3
Upper gastrointestinal endoscopy was performed again and revealed a normal oral cavity and esophagus, but deformed antrum with severe stricture in pylorus where a 6mm scope could not pass through it (Figure 3).
Pyloric stenosis after 2 months
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F4
After 4 courses of balloon dilatation with a 6-15 mm balloon with 3-4 weeks interval, the pyloric canal became normal and the scope passed easily into the duodenum (Figure 4).
Normal pyloric canal and duodenum after one year
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F5
The normal pyloric canal was seen after management (Figure 5).