A Floppy disk is composed of a thin and flexible electronic storage medium.
PUVA -LRB- psoralen and ultraviolet A -RRB- is an ultraviolet light therapy treatment for eczema , psoriasis , graft-versus-host disease , vitiligo , mycosis fungoides , large-plaque parapsoriasis and cutaneous T-cell lymphoma using the sensitizing effects of the drug psoralen .. ultraviolet light therapy. ultraviolet light therapy. eczema. eczema. psoriasis. psoriasis. graft-versus-host disease. graft-versus-host disease. vitiligo. vitiligo. mycosis fungoides. mycosis fungoides. large-plaque parapsoriasis. large-plaque parapsoriasis. cutaneous T-cell lymphoma. cutaneous T-cell lymphoma. psoralen. psoralen. The psoralen is applied or taken orally to sensitize the skin , then the skin is exposed to UVA .. psoralen. psoralen. 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 .. Photodynamic therapy. Photodynamic therapy. Still , PUVA therapy is often classified as a separate technique from photodynamic therapy .