Distribution of dysplasia positive biopsies with respect to their fluorescence
| 5-ALA application mode | All LGD (n) | Fluorescence positive LGD (n) | All HGD/carcinoma (n) | Fluorescence positive HGD/carcinoma (n) |
| 500 mg locally | 7 | 4 | 3 | 1 |
| 5 mg/kg orally | 0 | 0 | 0 | 0 |
| 10 mg/kg orally | 5 | 3 | 10 | 9 |
| 20 mg/kg orally | 1 | 1 | 2 | 2 |
| 30 mg/kg orally | 3 | 3 | 2 | 2 |
5-ALA, 5-aminolaevulinic acid; LGD, low grade dysplasia; HGD, high grade dysplasia.