GLASS LAB · Medical Aesthetics Evidence Index 303 cells · 19,226 papers · 5,969 top-tier evidence

Pigment · Nevus of Ota

Picosecond laser pigment evidence for Nevus of Ota

A 66.7 / 100 Supported 7 RCT/meta · 1 clinical/observational · 9 case · 27 total
Strong evidence · positive conclusion

This procedure group has the highest level of PubMed evidence for this indication, and the papers broadly support its effectiveness.

Grade combines the quantity and quality of the research, while direction is a separate signal showing how the papers assess effectiveness.

Includes meta-analysis/SR Median year 2021 Last 5 years 52% Positive results 85% Korea/Asia 15

Known in Korea as

피코슈어피코웨이피코토닝피코플러스피코슈어 프로피코 색소레이저

Procedure and brand names vary, but the evidence above applies to the same procedure mechanism.

Key papers

tier1 Investigating the efficacy and safety of the 755-nm picosecond alexandrite laser in treating nevus of Ota: A systematic review and meta-analysis. Medicine · 2026 · PMID 41731817

Abstract summary (English) BACKGROUND: The nevus of Ota is an uncommon pigmentary skin condition that causes bluish-gray pigmentation and is traditionally treated with a Q-switched laser. Emerging evidence suggests that the 755-nanometer picosecond alexandrite laser is a safe and effective therapeutic option. We sought to determine the overall effectiveness and safety profile of the 755-nanometer (nm) picosecond alexandrite laser for managing...

Journal Article, Systematic Review, Meta-Analysis

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tier1 The efficacy and adverse reactions of 755 nm picosecond alexandrite laser on the treatment of nevus of Ota at different endpoints: A split-lesion, single-blinded, randomized controlled comparison study. Journal of the American Academy of Dermatology · 2025 · PMID 40846236

Abstract summary (English) BACKGROUND: The picosecond alexandrite laser (PSAL) is a first-line treatment for nevus of Ota. However, low-fluence PSAL (LF-PSAL) that does not produce immediate whitening as treatment endpoint, remains unexplored. OBJECTIVE: To compare the efficacy and safety of LF-PSAL versus conventional high fluence PSAL (HF-PSAL) for treating nevus of Ota.

Journal Article, Randomized Controlled Trial, Comparative Study

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tier1 Comparison of the efficacy and safety of a 730-nm picosecond titanium sapphire laser and a 1064-nm picosecond neodymium yttrium aluminum garnet laser for the treatment of acquired bilateral nevus of Ota-like macules: A split-face, evaluator-blinded, randomized, and controlled pilot trial. Journal of cosmetic dermatology · 2024 · PMID 39180331

Abstract summary (English) BACKGROUND: The picosecond neodymium yttrium aluminum garnet laser (PNYL) has been successfully used in treating acquired bilateral nevus of Ota-like macules (ABNOM). The 730-nm picosecond titanium sapphire laser (PTSL) is an emerging tool for pigmentary disorders. However, no studies have compared two different wavelengths of picosecond laser for the treatment of ABNOM.

Journal Article, Randomized Controlled Trial, Comparative Study

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tier1 Comparing the efficacy and safety of Q-switched and picosecond lasers in the treatment of nevus of Ota: a systematic review and meta-analysis. Lasers in medical science · 2020 · PMID 32839837

Abstract summary (English) Nevus of Ota is cosmetically burdensome and often prompts patients to seek treatment. Lasers are commonly used in removing these lesions; however, no systemic analysis has been conducted to support a gold standard laser. To conduct a meta-analysis of the efficacy and safety of Q-switched Nd:YAG lasers (QSNL), Q-switched ruby lasers (QSRL), Q-switched alexandrite lasers (QSAL), and picosecond alexandrite lasers...

Journal Article, Meta-Analysis, Systematic Review

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tier1 A Prospective, Split-Face, Randomized Study Comparing Picosecond to Q-Switched Nd: YAG Laser for Treatment of Epidermal and Dermal Pigmented Lesions in Asians. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2020 · PMID 32604235

Abstract summary (English) BACKGROUND: Whether picosecond lasers outperform Q-switched lasers in treating pigmented lesions has not been clearly evaluated. OBJECTIVE: To compare the efficacy and safety of picosecond and Q-switched lasers in treating epidermal and dermal pigmented lesions in Asians. METHODS: Eight subjects with lentigines and 6 subjects with acquired bilateral nevus of Ota-like macules were enrolled.

Clinical Trial, Phase IV, Comparative Study, Journal Article, Randomized Controlled Trial

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tier1 Comparison of a picosecond alexandrite laser versus a Q-switched alexandrite laser for the treatment of nevus of Ota: A randomized, split-lesion, controlled trial. Journal of the American Academy of Dermatology · 2019 · PMID 30885760

Abstract summary (English) BACKGROUND: Novel picosecond lasers have been available for various pigmentary disorders. However, there are limited data directly comparing picosecond lasers and Q-switched lasers for treatment of nevus of Ota. OBJECTIVE: To compare the efficacy and safety of a picosecond alexandrite laser (PSAL) with a Q-switched alexandrite laser (QSAL) for the treatment of nevus of Ota.

Comparative Study, Journal Article, Randomized Controlled Trial

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tier1 A split-face, single-blinded, randomized controlled comparison of alexandrite 755-nm picosecond laser versus alexandrite 755-nm nanosecond laser in the treatment of acquired bilateral nevus of Ota-like macules. Journal of the American Academy of Dermatology · 2017 · PMID 29288102

Abstract summary (English) BACKGROUND: Q-switched alexandrite lasers (QSALs) have been used for the treatment of acquired bilateral nevus of Ota-like macules (ABNOMs). Currently, picosecond alexandrite laser (PSAL) pulses have become available for pigmentary disorders. However, no studies have compared PSAL and QSAL in the treatment of ABNOM.

Comparative Study, Journal Article, Randomized Controlled Trial

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tier2 Treatment of pigmentary disorders in patients with skin of color with a novel 755 nm picosecond, Q-switched ruby, and Q-switched Nd:YAG nanosecond lasers: A retrospective photographic review. Lasers in surgery and medicine · 2016 · PMID 26922302

Abstract summary (English) BACKGROUND AND OBJECTIVES: Laser procedures in skin of color (SOC) patients are challenging due to the increased risk of dyspigmentation and scarring. A novel 755 nm alexandrite picosecond laser has demonstrated effectiveness for tattoo removal and treatment of acne scars. No studies to date have evaluated its applications in pigmentary disorders.

Comparative Study, Journal Article

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tier0_review A Retrospective Study of Picosecond Alexandrite Laser Treatment for Acquired Bilateral Nevus of Ota-Like Macules in Children. Lasers in surgery and medicine · 2025 · PMID 40302165

Abstract summary (English) BACKGROUND: Picosecond lasers have been increasingly applied to the treatment of acquired bilateral nevus of Ota-like macules (ABNOMs), and proved safe and effective for adult patients. But there has been limited data concerned with their use in children. OBJECTIVE: To analyze the efficacy, safety, and correlative influencing factors of a 755 nm picosecond alexandrite laser in treating ABNOMs in children.

Journal Article, Review

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tier0_review Picosecond alexandrite laser treatment of nevus of Ota in children. Lasers in surgery and medicine · 2024 · PMID 38711166

Abstract summary (English) BACKGROUND: The picosecond alexandrite laser has been safely and effectively used to treat the nevus of Ota in adults. However, limited data are available for children. OBJECTIVE: To investigate the efficacy, safety, and correlative influencing factors of a 755nm picosecond alexandrite laser in the treatment of nevus of Ota in children.

Journal Article, Review

View on PubMed

Suggested interpretation

Strong evidence base

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