Abstract
A 1-year-old Asian girl with a congenital melanocytic nevus on her back was seen at the outpatient clinic. Clinical examination revealed a dark brown melanocytic nevus that measured 13×11cm. Histological findings showed superficial compound nevus and there is no evidence of malignancy. The patient was treated with the normal mode ruby laser (694nm, 18J/cm2, 1 msec, 15mm 15mm) and Q-switched alexandrite laser (755nm, 7J/cm2 50 nsec, 3mm). Degree of melanin contents was measured by difference measuring apparatus before treatment and 6 months after last treatment. The improvement rate by color difference measuring apparatus is 95.4%. Histological findings showed a marked decrease in the number of the nests in the junctional, papillary and reticular dermis was observed. Thus, this treatment was considered to be an effective therapeutic method in improving color tone. Further study is needed to follow up recurrence and malignant change.
