Photodynamic Therapy for Non-Melanoma Skin Cancers

Area of Science:

• Dermatology
• Oncology

Background:

• Non-melanoma skin cancer (NMSC) encompasses various skin malignancies, with surgical excision as a primary treatment.
• Actinic keratosis (AKs) are precancerous lesions with the potential to progress to squamous cell carcinoma (SCC).

Approach:

• Photodynamic therapy (PDT) utilizes photosensitizing agents activated by light to treat skin conditions.
• This approach is evaluated for efficacy in AKs, superficial basal cell carcinoma (BCC), nodular BCC, and Bowen's disease (SCC in situ).

Key Points:

• PDT demonstrates effectiveness for AKs and superficial BCC.
• Acceptable response rates are observed for nodular BCC and Bowen's disease, albeit with higher recurrence rates.
• Methylaminolevulinate (MAL) PDT shows improved outcomes over 5-aminolevulinic acid (ALA) PDT for nodular BCC.
• PDT yields superior cosmetic results compared to surgical treatments.
• The most common side effect of PDT is pain, indicating good overall tolerability.

Conclusions:

• PDT is a viable nonsurgical therapeutic option for various NMSC subtypes and AKs.
• The choice of photosensitizer and treatment protocol may influence outcomes, particularly for more advanced lesions.
• PDT presents a favorable alternative to surgery, emphasizing patient outcomes and cosmetic results.