Bottom Line: Photodynamic therapy (PDT) -which uses topical agents and light to kill tissue, appears to better clear actinic keratoses (AKs, a common skin lesion caused by sun damage) at three months after treatment than cryotherapy (which uses liquid nitrogen to freeze lesions). Author: Gayatri Patel, M.D., M.P.H., of the University of California Davis Medical Center, in Sacramento, and colleagues. Background: AKs are rough, scaly lesions on the ...
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