Clinical, histopathological and immunohistochemical assessment of human skin field cancerization before and after photodynamic therapy

Summary Background  The field cancerization concept in photodamaged patients suggests that the entire sun‐exposed surface of the skin has an increased risk for the development of (pre)‐malignant lesions, mainly epithelial tumours. Topical photodynamic therapy (PDT) is a noninvasive therapeutic method for multiple actinic keratosis (AK) with excellent outcome.

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