title: Novel treatment of Hori's nevus: A combination of fractional nonablative 2,940-nm Er:YAG and low-fluence 1,064-nm Q-switched Nd:YAG laser.
abstract: OBJECTIVE
  To demonstrate a combination laser therapy to treat Hori's nevus.
  
  
  METHODS
  A prospective study.
  
  
  METHODS
  A Singapore-based clinic.
  
  
  METHODS
  Five female patients, aged 30-46 years, with bilateral malar Hori's nevus.
  
  
  METHODS
  Photographs were taken before treatment and 1 month after laser treatment was completed. These were graded by three independent physicians. The patients were also asked to grade their treatment response subjectively. They were followed up for a total of 3 months after laser treatment to monitor recurrence.
  
  
  METHODS
  The fractional nonablative 2,940-nm Er:YAG laser with a fluence of 0.7 J/cm(2), spot size 12 mm, and frequency 15 Hz was used to perform a full-face single-pass treatment. Subsequently, a second pass and third pass over Hori's nevi were done bilaterally till the clinical endpoint of skin whitening. The 1,064-nm Q-switched (QS) Nd:YAG at a fluence of 2.0 J/cm(2), frequency 2 Hz, and 4-mm spot size was used to deliver multiple passes over Hori's nevus till erythema with mild petechiae appeared. We repeated the treatment once a week for 3 more consecutive weeks.
  
  
  RESULTS
  All five patients had above 80% improvement in their pigmentation and two (skin type III) achieved complete 100% clearance. Based on the patients' subjective assessments, all five of them expressed satisfaction and felt that their pigmentation had improved. There were no complications noted.
  
  
  CONCLUSIONS
  The fractional nonablative 2940 nm Er:YAG laser and Q-switched 1064nm laser Nd:YAG combination is an effective and safe treatment for Hori's nevus.
authors: Department of Surgery, Singapore General Hospital, Singapore.
authors: Brian Wei Cheng Anthony
authors: BW
authors: Tian
keywords: Hori's nevus; Q-switched Nd:YAG laser; combination laser; facial pigmentation; nonablative Er:YAG laser