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Treatment of Ectopic Mongolian Plaques with Q-switched Alexandrite Laser and/or Q-switched Nd:YAG Laser Haruna Asano 1 , Asami Tozawa 2 , Anna Funaki 2 , Mamiko Izumoto 2 , Sayoko Sanada 1 , Mayu Matsumoto 3 , Hideki Mori 2 , Hiroki Nakaoka 4 1Department of Plastic Surgery, Uwajima City Hospital 2Division of Plastic and Reconstructive Surgery, Ehime university Hospital 3Department of Plastic Surgery, Shikoku Cancer Center 4Department of Plastic Surgery, Minamimatsuyama Hospital pp.401-408
Published Date 2024/4/10
DOI https://doi.org/10.18916/keisei.2024040017
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 Ectopic Mongolian plaques usually resolve spontaneously but may persist into adulthood. Those that persist can be effectively treated with a Q-switched laser (ruby, alexandrite, Nd: YAG) whereas the relative efficacy of a Q-switched alexandrite laser (QSAL) in patients from Japan has not been determined.

 We therefore conducted a retrospective study of the outcome of 35 patients treated for ectopic Mongolian plaques after QSAL, Q-switched Nd:YAG laser (QSYL), or both between January 2010 and June 2021. The study population consisted of 21 patients treated with QSAL, 2 with QSYL, and 12 with both. Overall, a good outcome was obtained in all patients. Among patients treated with both lasers, QSAL was typically followed by QSYL. Patients who no longer responded to QSAL were subsequently treated with QSYL, which had a positive effect. These results demonstrate the efficacy of QSYL irradiation after QSAL irradiation in patients with Mongolian plaques.


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電子版ISSN 印刷版ISSN 0021-5228 克誠堂出版

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