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Nail Psoriasis

A Review

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Abstract

Nail psoriasis is common, occurring in up to half of patients with psoriasis and in 90% of patients with psoriatic arthritis. Left untreated, it may progress to debilitating nail disease, which leads to significant functional impairment.

The most common clinical signs of nail psoriasis are nail plate pitting and onycholysis. Other classical signs include oil drop discoloration, subungual hyperkeratosis, and splinter hemorrhages. The modified Nail Psoriasis Severity Index (mNAPSI) can be used to grade the severity of nail psoriasis, while the Nail Psoriasis Quality of Life Scale (NPQ10) is a questionnaire that evaluates the impact of nail psoriasis on the patient’s functional status and quality of life.

Treatment of nail psoriasis should be individualized according to the patient’s preferences, severity of nail changes, and presence of skin and/or joint involvement. Both topical and intralesional therapies are safe and effective treatment modalities for nail disease, but are limited by poor adherence and pain, respectively. Systemic therapy such as oral retinoids may be considered for widespread nail disease causing significant morbidity. Among biologic agents, tumor necrosis factor-a inhibitors and T-cell-targeted therapies such as ustekinumab may be useful for refractory severe nail psoriasis.

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This work is not supported by any funding source. The authors have no conflicts of interest that are directly relevant to the content of this review.

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  1. National Skin Centre, 1 Mandalay Road, Singapore, 308205

    Eugene S. T. Tan, Wei-Sheng Chong & Hong Liang Tey

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  1. Eugene S. T. Tan
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Tan, E.S.T., Chong, WS. & Tey, H.L. Nail Psoriasis. Am J Clin Dermatol 13, 375–388 (2012). https://doi.org/10.2165/11597000-000000000-00000

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