Efficacy and Adverse Effects of Q-Switched Ruby Laser on Solar Lentigines: A Prospective Study of 91 Patients with Fitzpatrick Skin Type II, III, and IV
Article first published online: 16 SEP 2008
© 2008 by the American Society for Dermatologic Surgery, Inc.
Volume 34, Issue 11, pages 1465–1468, November 2008
How to Cite
SADIGHHA, A., SAATEE, S. and MUHAGHEGH-ZAHED, G. (2008), Efficacy and Adverse Effects of Q-Switched Ruby Laser on Solar Lentigines: A Prospective Study of 91 Patients with Fitzpatrick Skin Type II, III, and IV. Dermatologic Surgery, 34: 1465–1468. doi: 10.1111/j.1524-4725.2008.34310.x
- Issue published online: 3 NOV 2008
- Article first published online: 16 SEP 2008
BACKGROUND Laser-induced postinflammatory hyperpigmentation could be a limiting factor for selecting patients appropriate for the use of ruby laser in the treatment of lentigenes, especially in dark-skinned individuals.
OBJECTIVE To evaluate the efficacy and adverse effects of Q-switched ruby laser light (694 nm) on solar lentigines in patients with Fitzpatrick skin type II, III, and IV.
METHODS AND MATERIALS Controlled comparison study in a university-based laser clinic center. Ninety-one solar lentigines in patients with skin type II, III, and IV were enrolled. All patients were followed for 6 months for frequency of side effects. Before-and-after photographs and images from all follow-up sessions were taken and then assessed by a blinded dermatologist for the evaluation of side effects.
RESULTS Complete clearance was achieved in all patients. Postinflammatory dyspigmentation occurred in 7.8% patients with Fitzpatrick skin type II, 9.8% patients with type III, and 16.6 patients with type IV (p=.67); all improved over a 6-month follow-up period.
CONCLUSION Q-switched ruby laser treatment is a safe procedure for the treatment of solar lentigines even in dark-skinned individuals. Considering routine factors in addition to melanin content alone is required for minimizing side effects, especially postinflammatory hyperpigmentation in darker skin.