Q - Switched Ruby Laser in the Treatment of Nevus of Ota = Q - Switched Ruby Laser in the Treatment of Nevus of Ota

다국어 초록 (Multilingual Abstract)

Background: The Q-switched ruby laser has recently shown that it can remove tattoos without searring. Tberefore the Q-switched raby laser is expected to be effective in the treatment of nevus of, which comtains pigmented cell in the dermis. Objective : The puepose of this study is to evaluate the efficacy of Q-switched ruby laser in the treatment of nevus of Ota. Methos : Twenty-five patients (6 men, 19 women) with nevus of Ota on the face were treated. The age of the patienta ranged from 3 to 62 years. The energy Huence used varied from 6 to 8.5 J/cm2. Treatmenk imtervals ranged from 1 to 3 months, and the number of treatments ranged from 2 to 9. Photographs were taken of all patieots before and on every return visit. The photographs were then compared with each other. After completion of treatment, we evaluated some parameters including tbe extent of pigment-free area within the skin lesions (score 0-4), degree of lightening iei the remaining skin lesions (score 0-3), and patients own or their parents opiriions on the result of treatment 4core 0-3). The scores of the above three parameters were added and tbe resulting scaes weae designated as excellent (score 9-10), good (score 7-8), moderate (score 5-6) and poor (score 0-4). Results : Excellent treatrnent response (score 9-10) was obtained in 6 of the 25 patients. In all patients disappearaece of pigmentation on a 40 percent or larger area was seen. One month after completion of treatment the remaining lesion sue was less than 40 percent of the original lesion in 21 (84.0%) patienits. The degree of lightening in the remaining lesion was marked (score 3) in 22 (88%) patients. No scarring was noted fallowing treatment. Transient hyperpigmentation was nated in 7 patients, and transient hypopigmented areas were noted in one patient. Conclusion : Q-switched ruby laser appears to be an effective and safe modality for the treatment of nevus of Ota. (Ann Dermatol S:(1) 6-13, 1996).