Needle‐free injection of 5‐aminolevulinic acid in photodynamic therapy for the treatment of non‐melanoma skin cancer

Photodynamic therapy (PDT) has been widely used in treatment for skin cancer. However, topical 5‐aminolevulinic acid (ALA) in PDT demonstrates poor therapeutic effect due to its shallow penetration. And intralesional ALA‐PDT can bring great pain. The purpose of this study was to evaluate the efficacy of PDT with needle‐free injection of ALA in the treatment of nonmalignant skin tumors.

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