Photodynamic therapy promises a rapid advancement in the ability tocombat a wide range of cancers, according to recent research. Photosensitizers such as Dusa's Levulan (aminolaevulinic acid) and QLT PhotoTherapeutics Photofrin (porfimer sodium) are already on the market, but look set to be superceded by second-generation compounds such as Scotia's Foscan (temoporfin), which suggest that it may now be possible to treat and cure certain cancers, as well as to provide palliation when the disease is more advanced, says the company.
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