The impact of occlusive vs non-occlusive application of 5-aminolevulinic acid (BF-200 ALA) on the efficacy and tolerability of photodynamic therapy for actinic keratosis on the scalp and face: A prospective within-patient comparison trial.
Photodermatol Photoimmunol Photomed
; 37(1): 56-62, 2021 Jan.
Article
en En
| MEDLINE
| ID: mdl-32974974
ABSTRACT
BACKGROUND:
Photodynamic therapy (PDT) is an effective treatment for actinic keratoses (AK). PDT is usually performed with occlusion of the photosensitizer prior to subsequent illumination.OBJECTIVES:
This study aimed to compare the efficacy and tolerability of occlusive versus non-occlusive application of a 5-aminolevulinic gel (BT-200 ALA) for PDT of multiple AK on the scalp or face.METHODS:
Prospective, investigator-blinded, within-patient comparison study on 45 patients. PDT with occlusion of ALA was performed in a target area on one randomized side of the scalp or face. One week later a contralateral target area received the same treatment except that no occlusion of the ALA gel was performed. 3 and 6 months after PDT, the clearance rate of a predetermined target lesion and the total clearance rate of all AK within the treated areas were determined. PDT-induced pain and skin phototoxicity and cosmetic outcome were also recorded.RESULTS:
Clearance rate of the target AK and total AK clearance rate at 3 months after PDT was 88.4% and 90.6% for occlusive PDT and 58.1% (P = .001) and 70.4% (P = .04) for non-occlusive PDT. The corresponding values at 6 months after PDT were 69.7% and 72.1% for occlusive PDT and 30.2% (P < .001) and 35.6% (P = .001) for non-occlusive PDT. Pain score and skin phototoxicity were significantly higher after occlusive ALA application. No difference was observed with respect to cosmetic outcome.CONCLUSIONS:
Occlusive application of ALA significantly improves the efficacy of PDT but is associated with more pain and increased phototoxicity.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fotoquimioterapia
/
Fármacos Fotosensibilizantes
/
Queratosis Actínica
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Ácido Aminolevulínico
Tipo de estudio:
Clinical_trials
/
Observational_studies
/
Risk_factors_studies
Límite:
Aged
/
Aged80
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Photodermatol Photoimmunol Photomed
Asunto de la revista:
ALERGIA E IMUNOLOGIA
/
DERMATOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Austria