GLASS LAB · Medical Aesthetics Evidence Index 303 cells · 19,226 papers · 5,969 top-tier evidence

Inflammatory / Specialty · Actinic keratosis

Photodynamic therapy evidence for Actinic keratosis

A 65.5 / 100 Supported 223 RCT/meta · 111 clinical/observational · 158 case · 845 total
Strong evidence · positive conclusion

This procedure group has the highest level of PubMed evidence for this indication, and the papers broadly support its effectiveness.

Grade combines the quantity and quality of the research, while direction is a separate signal showing how the papers assess effectiveness.

Includes meta-analysis/SR Median year 2017 Last 5 years 27% Positive results 51% Negative results 35 Korea/Asia 17

Known in Korea as

PDT 광역동

Procedure and brand names vary, but the evidence above applies to the same procedure mechanism.

Key papers

tier1 Comparative Efficacy of Photodynamic Therapy Versus Cryotherapy for Actinic Keratosis: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Journal of cosmetic dermatology · 2026 · PMID 41964358

Abstract summary (English) BACKGROUND: Photodynamic therapy and cryotherapy are treatment options for actinic keratosis; however, their efficacy and safety remain debated. AIMS: To perform a high-quality systematic review and meta-analysis exploring the efficacy and safety of photodynamic therapy and cryotherapy in actinic keratosis. METHODS: A systematic search was performed applying the Preferred Reporting Items for Systematic Reviews and...

Journal Article, Systematic Review, Meta-Analysis, Comparative Study, Review

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tier1 Novel abrasive and oscillating skin preparation device as pre-treatment of actinic keratosis in photodynamic therapy: A Single-center, prospective, open-label, randomized, split-site trial. Photodiagnosis and photodynamic therapy · 2026 · PMID 41794312

Abstract summary (English) BACKGROUND: Photodynamic therapy (PDT) is recommended as a first-line treatment for multiple actinic keratoses (AK) and field cancerized skin. When using PDT, skin preparation is recommended before application of photosensitizer cream to enhance absorption. Different physical methods exist to remove crusts and scales from the AK lesions.

Journal Article, Randomized Controlled Trial

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tier1 Randomized comparative study of 5-Fluorouracil 4%, tirbanibulin, and photodynamic therapy for relapsing actinic keratoses. Photodiagnosis and photodynamic therapy · 2026 · PMID 41580230

Abstract summary (English) BACKGROUND: Actinic keratosis (AK) reflects a field cancerization process in chronically sun-damaged skin, and relapse after diclofenac therapy is a frequent clinical scenario. Field-directed treatments such as 5-fluorouracil (5-FU), tirbanibulin, and photodynamic therapy (PDT) are widely used, yet comparative data in post-diclofenac relapse and the contribution of reflectance confocal microscopy (RCM) to...

Journal Article, Randomized Controlled Trial, Comparative Study

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tier1 Skin physiology during daylight photodynamic therapy with additional fractional laser therapy. European journal of dermatology : EJD · 2026 · PMID 41872081

Abstract summary (English) Daylight photodynamic therapy is currently the preferred treatment for actinic keratosis due to its greater effectiveness and a lower level of pain compared to conventional photodynamic therapy. To enhance the effectiveness of the therapy, especially for hyperkeratotic forms, various pre-treatments are currently available, primarily fractional laser therapy. Until now, there have been few studies investigating skin...

Journal Article, Randomized Controlled Trial

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tier1 Comparision of the efficacy of photodynamic therapy and imiquimod cream in patients with actinic keratosis: a systematic review and meta-analysis. Scientific reports · 2026 · PMID 41578002

Abstract summary (English) Actinic keratosis is a common precancerous epidermal skin lesion characterized by rough, scaly patches on sun-exposed areas due to chronic UV exposure, and it carries a risk of progressing to squamous cell carcinoma. Both photodynamic therapy and imiquimod cream have been proven to be effective therapeutic option for actinic keratosis. However, there is no comprehensive systematic review that compare the efficacy of...

Journal Article, Systematic Review, Meta-Analysis, Comparative Study, Review

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tier1 Comparative efficacy of photodynamic therapy versus conventional therapies for actinic keratosis: A systematic review and meta-analysis. Photodiagnosis and photodynamic therapy · 2025 · PMID 41360310

Abstract summary (English) BACKGROUND: Photodynamic therapy (PDT) is widely used for actinic keratosis (AK), but its comparative effectiveness versus conventional therapies remains unclear. OBJECTIVE: To systematically evaluate PDT efficacy compared with cryotherapy, 5-fluorouracil, and imiquimod for AK treatment through meta-analysis. METHODS: We conducted a systematic review and meta-analysis, searching PubMed, Embase, Cochrane, and Web of...

Journal Article, Systematic Review, Meta-Analysis, Comparative Study, Review

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tier1 Monitoring the Effectiveness of Noninvasive or Minimally Invasive Therapies for Nonmelanocytic Lesions Using Reflectance Confocal Microscopy: A Systematic Review. Actas dermo-sifiliograficas · 2025 · PMID 41349690

Abstract summary (English) In vivo reflectance confocal microscopy (RCM) enables monitoring of non-melanocytic skin cancers (NMSC) treated with non-invasive or minimally invasive therapies. This systematic review analyzed studies on NMSC treated with these therapies and monitored by RCM. A total of 56 articles were included, with 40 focusing on squamous conditions, such as actinic keratosis and squamous cell carcinoma, 15 on basal cell...

Journal Article, Systematic Review

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tier1 Can Urea 10% Promote Photosensitizer Uptake Before MAL-PDT for the Treatment of Facial Actinic Keratoses? Results of a Randomized Clinical Trial. Photodermatology, photoimmunology & photomedicine · 2025 · PMID 41187222

Abstract summary (English) BACKGROUND: Actinic keratoses (AKs) are precancerous lesions that may progress to squamous cell carcinoma (SCC). Photodynamic therapy (PDT) with methyl aminolevulinate (MAL) is an established treatment, often preceded by mechanical curettage to enhance photosensitizer penetration. However, curettage is associated with pain and discomfort, necessitating alternative pretreatment strategies, also applicable in daylight...

Journal Article, Randomized Controlled Trial

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tier1 High-dose oral vitamin D in combination with photodynamic therapy can accelerate the clearance rate of basal cell carcinoma: A randomized clinical trial. Photodiagnosis and photodynamic therapy · 2025 · PMID 40633744

Abstract summary (English) BACKGROUND: Combining Vitamin D (VD) with photodynamic therapy (PDT) increases the clearance of actinic keratosis, but whether this might also be true for basal cell carcinoma (BCC) was unknown. PATIENT AND METHODS: In an intra-patient, randomized clinical trial, 35 patients with multiple BCC received 3 sessions of PDT using 20 % ALA (4 hr incubation) and 417 nm light. PDT was preceded by randomized pretreatments...

Journal Article, Randomized Controlled Trial

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tier1 Painless PDT using 10% aminolevulinate gel and red light: A pilot clinical trial of short-contact protocols to reduce discomfort during illumination. Photodiagnosis and photodynamic therapy · 2025 · PMID 40581198

Abstract summary (English) BACKGROUND: Traditional red light photodynamic therapy for actinic keratoses (AK) causes significant pain during illumination. OBJECTIVE: To evaluate new short-incubation red light PDT regimens for their pain and efficacy characteristics. METHODS: Patients (n = 30) with facial AK were treated with 10 % ALA gel (no occlusion) and red light (635 nm), after randomization as follows [incubation time, illumination time...

Journal Article, Randomized Controlled Trial

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Suggested interpretation

Strong evidence base

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