Version July 2025
| Region | With dilatation | Without dilatation |
| Esophagus | Achalasia with mega-esophagus | Achalasia |
| Stomach | Acute gastric dilatation | Gastroparesis |
| Small bowel | Pseudo-obstruction | Chronic intestinal dysmotility |
| Colon | Megacolon/pseudo-obstruction | Slow transit constipation/colonic inertia |
