<unk>  is a psoralen + UVA treatment for eczema, psoriasis, graft-versus-host disease, vitiligo, mycosis fungoides, large-plaque parapsoriasis and cutaneous T-cell lymphoma. The psoralen is applied or taken orally to sensitize the skin, then the skin is exposed to UVA.
Photodynamic therapy is the general use of nontoxic light-sensitive compounds that are exposed selectively to light, whereupon they become toxic to targeted malignant and other diseased cells. Still,<unk>  therapy is often classified as a separate technique from photodynamic therapy.
PUVA
Blister
Gangrene 
Gangrene
Linitis plastica ct
Reinke's edema
Dent's disease
Bowen's disease