Treatment of cancer by intravenous injection of a photosensitizing agent, such as hematoporphyrin, followed by exposure to visible light of superficial tumors or of deep tumors by a fiberoptic probe. SYN: photochemotherapy, photodynamic therapy, p. therapy.
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n.
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pho·to·ra·di·a·tion (fo″to-ra″de-aґshən) photodynamic therapy.Medical dictionary. 2011.