Long-term improvement on photoaging after ALA photodynamic therapy for actinic keratosis: A retrospective study
Linglin Zhang1, Zijun Zhao1, Peiru Wang1
1Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China.
Background:
5-aminolevulinic acid photodynamic therapy (ALA-PDT) is not only the first-line treatment for actinic keratosis (AK), but also demonstrated to improve photoaging during AK field treatment. However, its long-term effect on photoaging remains elusive.
Objective:
To evaluate the long-term improvement effect of ALA-PDT on photoaging.
Methods:
The data of 10 patients with AK who received field-directed ALA-PDT on one side of the face and lesion-directed ALA-PDT on the other side were retrospectively reviewed. Their clinical photographs were evaluated with Global scores of photoaging (GSP) assessment independently by two dermatologists at baseline and 1 month, 6 months and 24 months after ALA-PDT.
Results:
GSP evaluation was performed after 24 months of follow-up. Improvements in the fine line and mottled pigmentation were observed (p < 0.05). All the 10 patients achieved complete response of AK lesions and had no relapse during the 24-month follow-up period.
Limitation:
A small sample size.
Conclusion:
Photoaging can be effectively alleviated in the long-term follow-up after ALA-PDT treatment for AK. The present study may inspire new treatment strategies for photoaging.
