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Aetiology and Location of Strictures
| Aetiology | No and location of strictures | |||||
| Pharyngo-oesophageal | Upper 1/3 | Middle 1/3 | Lower 1/3 | Stomach | Total | |
| Acids | 3 | 2 | 23 | 17 | 7 | 52(52.5%) |
| Alkali | - | 1 | 33 | 6 | - | 40 (40.4%) |
| Drugs | - | - | 1 | - | - | 1(1.0%) |
| Peptic | - | - | - | 5 | - | 5(5.1%) |
| Total | 3(3.0%)l | 3(3.0%) | 57(57.6%) | 29(29.5%) | 7(7.1%) | 99(100.0%) |
