Efficacy of Q-switch 532 nm Nd:YAG Laser in acquired melanocytic nevi
Keywords:
Q switch Nd Yag laser, Melanocytic naevi, Benign pigmentedAbstract
Acquired melanocytic naevi are benign pigmented skin lesions characterized by asymptomatic, small macules, papules and nodules. These consists of clusters of melanocytic nevus cells distributed in epidermis, dermis and subcutaneous tissue.In the past ablative lasers like CO2 and Erbium:Yag lasers were used to treat them. However due to their adverse effects of scarring and depigmentation they have been replaced by new lasers. OBJECTIVE: To determine efficacy of Q-switched 532nm Nd:YAG laser in treating acquired melanocytic nevi. MATERIAL AND METHODS Total 77 patients meeting inclusion criteria were taken from outpatient Dermatology Department, Jinnah Hospital, Lahore. After informed consent, name, age, gender, duration, site, size and color of nevi were noted. All patients underwent treatment with 532nm Q-Switched Nd:YAG laser, repetition rate 1Hz, pulse width 10 nanoseconds, spot size: 2 to 6mm and fluence 0.17-2.12 J/cm2, Improvement was assessed according to operational definition between pre and post treatment photographs. RESULTS The mean age of patients was 31.12 ± 9.62 years (16-46years). There were 23(29.9%) male and 54(70.1%) females, with female to male ratio as 2.35:1. Efficacy of treatment was achieved in 65(84.4%) while efficacy was not achieved in 12(15.6%) cases. CONCLUSION: It is concluded that efficacy was achieved in 84.4% cases with Q-switched 532nm Nd YAG laser in treating acquired melanocytic nevi. Hence in future we can use Q-switched 532nmNd: YAG laser in treatment of acquired melanocytic nevi.References
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