Evaluation Efficacy And Safety Of Q-switched Nd:YAG 1064nm And 532nm Laser For The Treatment Of Naevus Fusco-Caeruleus Zygomaticus

Objectives:To retrospectively evaluate the efficacy and safety of 532nm Q-switched Nd:YAG nanosecond laser(532nm QSNYL)and 1064nm Q-switched Nd:YAG nanosecond laser(1064nm QSNYL)for the treatment of Naevus Fusco-Caeruleus Zygomaticus.Methods:The clinical characteristics of 126 patients with Naevus Fusco-Caeruleus Zygomaticus were retrospectively analyzed,including gender,Fitzpatrick skin type,onset age,lesion color,and involved site.Among them,67 patients were treated with 532nm QSNYL and 59 patients were treated with 1064nm QSNYL.According to the photos before and after each treatment,the curative effect was evaluated according to the relevant criteria of curative effect,and the adverse reactions and recurrence were recorded.The curative effect,adverse reaction and recurrence rate of the two kinds of laser were analyzed retrospectively.Results:After 126 patients received an average of 2.45 treatments,the total effective rate of QSNYL treatment was 60.32%.The total effective rate of 532nm QSNYL and 1064nm QSNYL were 64.18%and 55.93%,respectively.The incidence of temporary pigmentation was 71.64%and 49.15%,respectively.The incidence of postoperative chloasma was 0%and 18.64%respectively.There was no significant difference in the effective rate between the two wavelengths,but the incidence of pigmentation and the incidence of postoperative chloasma were significant.With the increase of the number of QSNYL treatments,the total effective rate gradually increased from 18.43%of the patients treated once to 100.0%of the patients treated more than 4 times.33 patients who recovered were followed up for 6 months or more,and no recurrence was found.Conclusion:1.Both 532nm QSNYL and 1064nm QSNYL are effective and safe in the treatment of Naevus Fusco-Caeruleus Zygomaticus,and there is no recurrence after treatment.2.1064nm QSNYL was more likely to induce chloasma than 532nm QSNYL in the treatment of Naevus Fusco-Caeruleus Zygomaticus.532nm QSNYL was more likely to occur pigmentation than 1064nm QSNYL in the treatment of Naevus Fusco-Caeruleus Zygomaticus.3.The curative effect of Q-switched Nd:YAG 1064nm and 532nm laser in the treatment of Naevus Fusco-Caeruleus Zygomaticus was positively proportional to the number of treatments.