Journal of Clinical and Aesthetic Dermatology

AUG 2017

An evidence-based, peer-reviewed journal for practicing clinicians in the field of dermatology

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erb:YaG laser is able to ablate the epidermis partially. Freckles exist at the dermo-epidermal junction. at areas of partial ablation, these pigments can be removed immediately or extruded subsequently. concurrently, there is coagulation of the upper dermis, which contributes to brightening and tightening of the face. 8–10 although this system works in a similar fashion to the co 2 laser, the gentler nonablative settings ensure faster recovery (5–7 days) with less risk of pih and scarring. in conclusion, the 2940nm erb:YaG laser might be considered an effective and quick modality for removing freckles without scarring or causing permanent pigmentary changes in asian skin. REFERENCES 1. Grevelink Jm, ross eV, anderson rr. lasers in dermatology. in: Freedberg im, eisen aZ, wolff k, et al, eds. Fitzpatrick's Dermatology in General Medicine. 5th ed. new York: mcGraw-hill, 1999:2901–2921. 2. Jang ka, chung ec, choi Jh, et al. successful removal of freckles in asian skin with a Q-switched alexandrite laser. Dermatol Surg. 2000;26:231–234. 3. rashid T, hussain i, haider m, haroon Ts. laser therapy of freckles and lentigines with quasi-continuous, frequency- doubled, nd:YaG (532 nm) laser in Fitzpatrick skin type iV: a 24-month follow-up. J Cosmet Laser Ther. 2002;4:81–85. 4. hruza GJ, dover Js, Flotte TJ, Goetschkes m, watanabe s, anderson rr. Q-switched ruby laser irradiation of normal skin: histologic and ultrastructural findings. Arch Dermatol. 1991;127:1799–1805. 5. watanabe s, Flotte TJ, margolis r, et al. The effect of pulse duration on selective pigment cell injur y by dye lasers. Invest Dermatol. 1987;88:523. 6. kilmer sl, wheeland rG, Goldberg dJ, anderson rr. Treatment of epidermal pigmented lesions with the frequency- doubled Q-switched nd:YaG laser. Arch Dermatol. 1994;130:1515–1519. 7. dover Js, smoller br, stern rs, rosen s, arndt ka. low-fluence carbon dioxide laser irradiation of lentigenes. Arch Dermatol. 1988;124:1219–1224. 8. christian mm. microresur facing using the variable-pulse erbium:YaG laser: a comparison of the 0.5- and 4-ms pulse durations. Dermatol Surg. 2003;29:605– 611. 9. Grema h, Greve b, raulin c. Facial rhytides--subsur facing or resur facing? a review. Lasers Surg Med. 2003;32:405– 412. 10. kunzi-rapp k, dierickx cc, cambier b, et al. minimally invasive skin rejuvenation with erbium:YaG laser used in thermal mode. Lasers Surg Med. 2006;38:899– 907. JCAD 30 JCAD JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY august 2017 • Volume 10 • number 8 b r i e F r e p o r T

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