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  • Title: Q-switched ruby laser in the treatment of nevus of Ota.
    Author: Yang HY, Lee CW, Ro YS, Yu HJ, Kim YT, Kim JH, Kim JH.
    Journal: J Korean Med Sci; 1996 Apr; 11(2):165-70. PubMed ID: 8835765.
    Abstract:
    The purpose of this study is to evaluate the efficacy of Q-switched ruby laser in the treatment of nevus of Ota, a pigmented lesion on the face. The Q-switched ruby laser has been shown to remove tattoos without scarring. With this in mind, the nevus of Ota with pigmented cells in the dermis could be effectively treated with Q-switched ruby laser. Eighty patients (19 men, and 61 women) with nevus of Ota on the face were enlisted to be tested in evaluating the efficiency of Q-switched ruby laser therapy. The age of patients ranged from 1 to 62 years. The energy fluence used varied from 6 to 8.5 J/cm2. Treatment intervals ranged from 4 to 16 weeks, and the number of treatment sessions varied between 1 to 9 visits. During a 2-year follow-up period, more than fifty percent removal of nevus-pigment was noted in 64 of the 80 patients. Transient hyperpigmentation was noted in 32 patients lasting for 2 to 6 months after treatment; transient hypopigmentation was seen in 3 cases which recovered within one year. No patients had permanent textural or pigmentary changes or scarring. Q-switched ruby laser therapy appears to be an effective and safe modality for the treatment of nevus of Ota.
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