Treatment of acquired bilateral nevus of Ota-like macules (Hori's nevus) using 1064-nm Q-switched Nd:YAG laser with low fluence.
BACKGROUND
Acquired bilateral nevus of Ota-like macules (ABNOM), or Hori's nevus, is a common dermal melanocytic hyperpigmentation in Asians.


OBJECTIVE
To describe the effect of 1064-nm Q-switched Nd:YAG laser (QSNY) with low fluence in South Korean patients with ABNOM.


METHODS
Fifteen South Korean patients (13 women and two men; mean age, 33.2 years; range, 26-52 years; Fitzpatrick skin type IV), clinically diagnosed with ABNOM, and treated using 1064-nm QSNY with low fluence, were enrolled in this study. Patients were treated with 1064-nm QSNY using a MedLite C6 (HoyaConBio Inc., Fremont, CA, USA) at 1-2-week intervals. The laser settings were 2.2-2.6 J/cm(2) using a 6-mm spot size, followed by 4-6 J/cm(2) using a 4-mm spot size.


RESULTS
The median number of QSNY treatment sessions was 11 (range, 10-15). Follow-up results 2 months after the final treatment revealed that seven of the 15 patients (46.7%) demonstrated clinical improvement of 76-100%, and five (33.3%) of 51-75%. Three patients showed moderate clinical improvement between 26% and 50%. Post-therapy dyschromia, including hypo- and hyperpigmentation, was not observed.


CONCLUSIONS
We suggest that QSNY with low fluence provides an easy-to-perform, low-downtime, effective treatment algorithm in certain cases of ABNOM in Asian patients.
Cho
Sung Bin
SB
Department of Dematology and Cutaneous Biology Research Institute, Yonsei university College of Medicine, Seoul, South Korea.
Park
Soo Jie
SJ
Kim
Moon Jung
MJ
Bu
Tae Sung
TS
D000328:Adult; D002610:Cheek; D005153:Facial Neoplasms / Q000601:surgery; D005260:Female; D006801:Humans; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009507:Nevus of Ota / Q000601:surgery*; D012878:Skin Neoplasms / Q000601:surgery*