A retrospective analysis of the management of freckles and lentigines using four different pigment lasers on Asian skin

Background: The risk of post-inflammatory hyperpigmentation (PIH) is increased during freckles and lentigines treatment in Asians. Objective: To determine the effectiveness and safety of using 595-nm long pulsed dye laser (LPDL), 755-nm LP Alexandrite laser, 532-nm QS Nd:YAG laser and 532-nm LP pota...

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Bibliographic Details
Published in:Journal of cosmetic and laser therapy 2012-04, Vol.14 (2), p.74-80
Main Authors: Ho, S. G. Y., Chan, N. P. Y., Yeung, C. K., Shek, S. Y., Kono, T., Chan, H. H. L.
Format: Article
Language:English
Subjects:
Adult
asian
Asian Continental Ancestry Group
Female
freckles
Humans
Hyperpigmentation - ethnology
Hyperpigmentation - etiology
Lasers, Dye - adverse effects
Lasers, Dye - therapeutic use
Lasers, Solid-State - adverse effects
Lasers, Solid-State - therapeutic use
lentigines
Lentigo - ethnology
Lentigo - therapy
Melanosis - ethnology
Melanosis - therapy
Middle Aged
oriental and lasers
Retrospective Studies
Treatment Outcome
Young Adult
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Summary:Background: The risk of post-inflammatory hyperpigmentation (PIH) is increased during freckles and lentigines treatment in Asians. Objective: To determine the effectiveness and safety of using 595-nm long pulsed dye laser (LPDL), 755-nm LP Alexandrite laser, 532-nm QS Nd:YAG laser and 532-nm LP potassium-titanyl-phosphate (KTP) laser for the treatment of freckles or lentigines in Asian patients. Methods: This is a retrospective study of 40 Chinese patients, who were divided into four groups based on treatment modality using four different pigment lasers. Each patient attended between 1 and 4 treatments (mean of 1.8), at 4-6 weeks intervals, depending on clinical response. Lesional clearance and PIH were assessed by two independent clinicians. Results: Statistically significant improvement of global and focal facial pigmentation was found after treatment with LPDL, QS Nd:YAG and LP KTP lasers. No significant improvement was found after LP Alexandrite laser. PIH risk was 20% after LP Alexandrite treatment, 10% with QS Nd:YAG, and absent after LPDL and LP KTP treatment. Conclusion: A long pulse laser and small spot size appear to reduce the risks of lentigines treatment in darker skin types.
ISSN:1476-4172
1476-4180
DOI:10.3109/14764172.2012.670707