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Histological score range for the epidermis
| Score | Crust | Epithelialization | Rete ridge |
|---|---|---|---|
| 0 | Loosely attached | no | no |
| 1 | Tightly attached | minimal | no |
| 2 | Tightly attached | mild | no |
| 3 | Tightly attached | moderate | no |
| 4 | No crust attached | moderate | no |
| 5 | No crust attached | severe | no |
| 6 | No crust attached | complete | no |
| 7 | No crust attached | complete | yes |
