| 1O2 | singlet oxygen |
| ALA | 5-aminolevulinic acid |
| AK | actinic keratosis |
| BCC | basal cell carcinoma |
| BD | Bowen’s disease |
| CR | complete response |
| DFO | desferrioxamine |
| MAL | methyl aminolevulinate |
| nBCC | nodular basal cell carcinoma |
| PDT | photodynamic therapy |
| PpIX | protoporphyrin IX |
| PS | photosensitizer(s) |
| RCT | randomized controlled trial |
| ROS | reactive oxygen species |
| sBCC | superficial basal cell carcinoma |