Long-pulsed 532-nm Nd:YAG laser treatment for small acquired melanocytic nevi in a single session: an 8-year study on 350 Yemeni patients.

INTRODUCTION

Current laser treatments for acquired melanocytic nevi are unpredictable in terms of efficiency and cause considerable scarring. This study aimed to assess the efficacy and safety of the long-pulsed 532-nm Nd:YAG laser for removing small acquired melanocytic nevi in Yemeni patients.

METHODS AND MATERIALS: From January 2004 to 2012, 350 patients (M:F; 41:309) with Fitzpatrick skin type IV and 1 or more small acquired melanocytic nevi were included in the study. The patients were exposed to the following laser parameters: wavelength, 532 nm; pulse duration, 20 ms; spot size, 2 mm; fluence, 30-50 j/cm². Photographs were taken on 0, 1, 4, and 12 weeks posttreatment. The follow-up period ranged from 12 weeks to 5 years.

RESULTS

All nevi were completely removed with good to excellent cosmetic results in only one session. Side effects were seen in 30% of patients; the majority was temporary and, very mild in intensity, such as postinflammatory hyperpigmentation. Atrophic and hypertrophic scars were observed in 9.4% and 0.6% of cases, respectively. Recurrence was seen within 2-6 months after laser treatment in 25 patients.

CONCLUSION

The long-pulsed, 532-nm Nd:YAG laser is safe and effective in the removal of small acquired melanocytic nevi in Yemeni patients.