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- W2066227989 abstract "Photodynamic therapy (PDT) with topical δ-aminolevulinic acid (ALA) of non-melanoma skin cancers is often associated with treatment-limiting pain. A previous study on basal cell carcinomas (BCCs) at Roswell Park Cancer Institute evaluated a two-step irradiance scheme as a means of minimizing pain, preserving outcomes, and limiting treatment time. We used an initial low irradiance until 90% of the protoporphyrin IX was photobleached, followed by a high irradiance interval until the prescribed fluence was delivered. Success of this pilot investigation motivated integration of the protocol into routine practice. Here, we present a retrospective review of recent clinical experience in a broad patient population.This was a retrospective review of an existing dermatology database. Fourteen caucasion patients-nine men and five women, ages 18-80, with a total of 51 superficial and 73 nodular BCCs, and three Bowen's disease lesions-were included. ALA was applied to each lesion for approximately 4 hours. Lesions received an initial irradiance of 30-50 mW/cm(2) for 20 J/cm(2) , followed by 150 mW/cm(2) for a total fluence of 200-300 J/cm(2) . Pain was assessed using a visual analog scale (VAS). Clinical outcome was determined at 6-12 months.Median VAS scores were 1.0 for both irradiances. Five of 127 lesions required pain control with 1% xylocaine. Pain was strongly influenced by lesion location but not by lesion type, number, or size. Complete responses were achieved in 84.1% of BCCs, which compares favorably with reported results for single ALA-PDT treatments. Two of three Bowen's disease lesions showed a complete response. Complete responses for nodular BCCs were 37%, which are also within the range of reported outcomes.A two-step irradiance protocol in ALA-PDT effectively minimizes pain, maintains excellent clinical outcomes in superficial lesions, and adds minimal treatment time." @default.
- W2066227989 created "2016-06-24" @default.
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- W2066227989 date "2013-02-01" @default.
- W2066227989 modified "2023-10-17" @default.
- W2066227989 title "A retrospective review of pain control by a two-step irradiance schedule during topical ALA-photodynamic therapy of non-melanoma skin cancer" @default.
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- W2066227989 doi "https://doi.org/10.1002/lsm.22118" @default.
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