All > Medicine > Cancer - The effect produced when certain
substances are exposed to light. In cancer treatment, some drugs
become active when exposed to light and are then able to kill
tumor cells. National Cancer Institute - Cite This Source - This
Definition - arsenic, dihematoporphyrin ether, hematoporphyrin
derivative, HPPH, LED therapy, light-emitting diode therapy,
methyl-5-aminolevulinate, photodynamic therapy, Photofrin,
photosensitizer, photosensitizing agent, porcine, porfimer
sodium, psoralen and ultraviolet A therapy, PUVA therapy,
silicon phthalocyanine 4, talaporfin sodium