Distribution of biopsies with or without dysplasia with regard to their fluorescence
| Dysplasia positive | Dysplasia negative | ||||
| 5-ALA application mode | Fluorescence positive (n) | Fluorescence negative (n) | Fluorescence positive (n) | Fluorescence negative (n) | |
| 500 mg locally | 6 | 4 | 27 | 59 | |
| 5 mg/kg orally | 0 | 0 | 18 | 23 | |
| 10 mg/kg orally | 12 | 3 | 18 | 23 | |
| 20 mg/kg orally | 3 | 0 | 20 | 21 | |
| 30 mg/kg orally | 5 | 0 | 16 | 6 | |
5-ALA, 5-aminolaevulinic acid.