Photodynamic therapy for psoriasis?

Photodynamic therapy (PDT), the activation of a photosensitive compound by high intensity red light, is useful for Bowens' disease, thin basal carcinomata and as an adjunctive therapy for various internal malignancies. Its use in the treatment of psoriasis has been attempted only quite recently and some modest success achieved. These clinical experiences are reviewed and the rationale for using PDT for psoriasis is discussed.