LAUSR

ted lesions showed significant lightening and cosmetic improvement after two or fewer treatments. Levin et al. and Chan et al. reported the successful application of PSAL for the treatment of naevus of Ota. It was observed that fewer treatment sessions were required by PSAL to achieve comparable clinical efficacy compared with Q-switched lasers. Our results also suggested that PSAL is an effective and safe treatment approach for naevus of Ota in Chinese patients. The clinical outcomes were promising but further research is necessary. There was a lack of a control group, and the study was limited by its retrospective nature. Prospective controlled clinical trials are in need to confirm our findings and establish the true potential of picosecond lasers in the treatment of naevus of Ota. Supported by CAMS Innovation Fund for Medical Sciences (No. CIFMS-2017-I2M-1-017) and Key R&D Plans of Jiangsu Province (No. BE2017808).