Related Experiment Video
Updated: Jun 23, 2026
Using a 1064-nm Picosecond Neodymium-Doped Yttrium Aluminum Garnet Laser for Periorbital Hyperpigmentation
Published on: May 23, 2025
Treatment of Becker's nevi with a long-pulse alexandrite laser
Jae Eun Choi1, Ji Woong Kim, Soo Hong Seo
1Department of Dermatology, College of Medicine, Korea University, Seoul, Korea.
Background:
Becker's nevus (BN) can be a distressing cosmetic handicap for patients and a treatment challenge for physicians. Various treatment modalities have been used, but repigmentation commonly occurs after treatment.
Objective:
To evaluate the efficacy of long-pulse alexandrite laser in the treatment of BN.
Materials And Methods:
Eleven Korean patients with Fitzpatrick skin type III to V were included in this study. A long-pulsed alexandrite laser with a wavelength of 755 nm and a pulse duration of 3 ms was used. Patients were treated with a fluence of 20 to 25 J/cm(2) and a spot size of 15 to 18 mm. Cryogen spray cooling was not used.
Results:
Two patients had excellent responses, five had good responses, and four had fair responses. Hair density simultaneously decreased with treatment in all patients. Although mild hypopigmentation was observed in some patients, and partial hypertrophic scarring was observed in one patient, the outcomes were cosmetically acceptable. No repigmentation was noted during the follow-up period.
Conclusion:
A long-pulsed alexandrite laser without cryogen spray cooling is an effective and safe alternative in the treatment of BN.
