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ABSTRACT: Background
Blue light photodynamic therapy (PDT) is effective for actinic keratosis, but many patients experience stinging pain during illumination.Objective
To compare a conventional regimen (1 hour of 5-aminolevulinic acid [ALA] preincubation, followed by blue light) versus a new modified regimen in which blue light is started immediately after ALA application.Methods
A clinical trial with a bilaterally controlled, intrapatient study design was conducted with 23 patients. Topical 20% ALA was applied to the entire face and/or scalp. On 1 side of the body, blue light was started immediately and continued for either 30, 45, or 60 minutes (simultaneous PDT). On the contralateral side, the blue light began 1 hour after ALA application and lasted 1000 seconds (conventional PDT). Pain was evaluated on a scale from 0 to 10. Actinic keratosis lesion counts were determined by clinical examination and photography.Results
All patients experienced significantly less pain during simultaneous illumination than during the conventional regimen. At 3 months after treatment, lesion clearance was nearly identical on the 2 sides, as determined by statistical testing of noninferiority ± 15% margin.Limitations
Although bilaterally controlled, the study was relatively small. Additional studies are recommended.Conclusion
The modified PDT regimen is essentially painless, yet it provides treatment efficacy similar to a conventional regimen.
SUBMITTER: Kaw U
PROVIDER: S-EPMC8036906 | biostudies-literature |
REPOSITORIES: biostudies-literature