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

Rashid, Tariq; Hussain, Ijaz; Haider, Mobeen Zaka; Haroon, Tahir Saeed

doi:10.1080/147641702321136246

Cited by 37 publications

(32 citation statements)

References 11 publications

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“…It has been suggested that the photomechanical effect of QS lasers may not be desirable when used in the removal of lentigines in pigmented skin type [6,7,10]. Other studies have recently confirmed the effectiveness of long-pulsed 532 nm laser in the treatment of lentigines in dark skin patients [11]. The IPL, which emits a broadband of visible light from a non-coherent filtered flashlamp, produces only photothermal effects.…”

Section: Discussionmentioning

confidence: 99%

Q‐switched ruby versus long‐pulsed dye laser delivered with compression for treatment of facial lentigines in Asians

et al. 2005

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Background and Objectives: Q-switched lasers have been used for the treatment of lentigines but postinflammatory hyperpigmentation (PIH) can be an issue especially in Asians. The 595 nm long-pulsed dye laser (LPDL) has been used for the treatment of vascular lesions and although it is well absorbed by oxyhemoglobin, it is also absorbed by melanin. To use this device for the treatment of facial lentigines, we attached a flat glass lens to the tip of the laser's handpiece, allowing compression of the skin during treatment. In doing so, eliminated the absorption by oxyhemoglobin. This prospective study aims to compare the efficacy and complications of such an approach to the use of Q-switched ruby laser (QSRL) in the treatment of facial lentigines in Asians. Study Design/Materials and Methods: Eighteen Asian patients (1 male, 17 female) with facial lentigines Fitzpatrick skin types III-IV were enrolled. One of the lentigines present was treated with LPDL by compression method and the other one was treated with QSRL. A LPDL emitting wavelength of 595 nm, spot size of 7 mm was used, with fluence between 10 and 13 J/cm 2 and pulse duration of 1.5 milliseconds. Cryogen spray cooling was not used. A 694 nm QSRL was used with a spot size of 4 mm, fluence of 6-7 J/cm 2 , and pulse duration of 30 nanoseconds. Lightening of the lesions was assessed by reflectance spectrometer Erythema, hypo-or hyperpigmentation and scarring were also assessed by clinical examinators. Results: The degree of clearing achieved with the two lasers was 70.3% and 83.3% for QSRL and LPDL, respectively. All QSRL treated areas developed erythema whereas only 4 of 18 LPDL treated areas developed erythema. Hyperpigmentation was seen in four patients after QSRL, but not after LPDL. There was no scarring or hypopigmentation. Conclusions: LPDL delivered with a compression method is more effective than QSRL for facial lentigines. Complications after LPDL treatment were substantially less frequent than after QSRL. The addition of compression technique may allow ''vascular'' pulsed dye laser to be used for treating a variety of pigmented lesions. Lasers Surg. Med. 38:94-97, 2006. ß 2005 Wiley-Liss, Inc.

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Section: Discussionmentioning

confidence: 99%

Q‐switched ruby versus long‐pulsed dye laser delivered with compression for treatment of facial lentigines in Asians

et al. 2005

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“…11 The pulse duration applied was 1.6 microseconds; exposure time was 0.01 second to continuous; and spot size 2 mm. Irradiation was delivered during 3 to 8 sessions at 4-to 12-week intervals.…”

Section: Laser Therapymentioning

confidence: 99%

Treatment of solar lentigines

Ortonne

Pandya

Lui

et al. 2006

Journal of the American Academy of Dermatology

121

106

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“…24 Side effects included hypo-pigmentation (25%), textural changes (15%), and hyperpigmentation (10%), but these were mild and resolved within six months. Rosenbach et al treated 21 patients with solar lentigines two times with an alexandrite laser (7 mm spot, fluence 35-40 J/cm 2 , 5 ms pulse duration) and noted excellent improvement in 19 patients.…”

Section: Casementioning

confidence: 99%

“…3-5, to produce lesion clearance compared to Q-switched lasers. 13,24 Café-au-lait macules Café-au-lait macules (CALMs) are well-circumscribed brown macules and patches that may occur as isolated lesions or associated with neurocutaneous syndromes like neurofibromatosis or McCune-Albright syndrome. They appear at birth and may increase in number with age and are persistent.…”

Section: Casementioning

confidence: 99%

Treatment of Pigmented Lesions in the Asian Skin

Tay¹

2011

Textbook of Laser and Light Dermatology in the Asian Skin

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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

Abstract: The quasi-continuous, frequency-doubled Nd:Y AG (532 nm) laser safely and effectively treats freckles and lentigines in Fitzpatrick skin type IV.

Cited by 37 publications

References 11 publications

Q‐switched ruby versus long‐pulsed dye laser delivered with compression for treatment of facial lentigines in Asians

Q‐switched ruby versus long‐pulsed dye laser delivered with compression for treatment of facial lentigines in Asians

Treatment of solar lentigines

Treatment of Pigmented Lesions in the Asian Skin

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