Photodynamic Therapy in Dermatology.

Area of Science:

• Dermatology
• Photodynamic Therapy
• Oncology

Background:

• Photodynamic therapy (PDT) is a minimally invasive treatment.
• Its success depends on photosensitizer, light, and oxygen interaction.
• PDT generates reactive oxygen species for selective cytotoxicity.

Purpose of the Study:

• To review the mechanisms and clinical evidence of PDT in dermatology.
• To explore PDT's applications in neoplastic, inflammatory, infectious, and aesthetic conditions.
• To summarize current understanding and future directions of PDT.

Main Methods:

• Comprehensive literature search including randomized trials, systematic reviews, and meta-analyses.
• Inclusion of mechanistic and translational studies.
• Narrative review approach.

Main Results:

• Strong evidence for field-directed PDT in actinic keratosis and Bowen's disease.
• Selective role in basal cell carcinoma; limited monotherapy use in squamous cell carcinoma due to recurrence.
• Expanding utility in acne and infectious dermatoses; beneficial cosmetic applications.

Conclusions:

• PDT is an adaptable therapeutic framework for various dermatological conditions.
• It shows promise in oncology, inflammatory diseases, infections, and aesthetic treatments.
• PDT is best integrated into mechanism-oriented, multimodal treatment algorithms.