Major endoscopic features of eosinophilic oesophagitis (EREFS classification)
| Endoscopic feature | Grading | Characteristics |
|---|---|---|
| White exudates also referred to as white spots, white plaques | 0 | Absent |
| 1 | Mild, lesions involving <10% of the oesophageal surface area | |
| 2 | Severe, lesions involving >10% of the oesophageal surface area | |
| Rings also referred to as concentric rings, corrugated oesophagus, corrugated rings, ringed oesophagus, trachealisation | 0 | Absent |
| 1 | Mild, subtle circumferential ridges | |
| 2 | Moderate, distinct rings that do not impair passage of a standard adult endoscope | |
| 3 | Severe, distinct rings that do not permit passage of a standard adult endoscope | |
| Oedema also referred to as decreased vascular markings, mucosal pallor | 0 | Absent, distinct vascularity present |
| 1 | Loss of clarity or absence of vascular markings | |
| Furrows also referred to as vertical lines, longitudinal furrows | 0 | Absent |
| 1 | Present | |
| Stricture also referred to as narrow calibre oesophagus | 0 | Absent |
| 1 | Present |
Modified from Hirano et al.48