WordNet

separation of a nail from its normal attachment to the nail bed

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/01/11 03:16:10」(JST)

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Onycholysis refers to the detachment of the nail from the nail bed, usually starting at the tip and/or sides.^[1] On the hands, it is said to occur particularly on the ring finger but can occur on any of the fingernails. It may also happen to toenails.

The most common cause of onycholysis is psoriasis. It can also occur in thyrotoxicosis and is thought to be due to sympathetic overactivity.^[2] It may also be seen in infections or trauma.^[3]

Etymology

Onycho-, from Ancient Greek ónuks, meaning nail, and Ancient Greek lúsis, meaning a loosening.

Causes

Idiopathic
Trauma , excessive manicuring
Infection: especially fungal
Skin disease: psoriasis, dermatitis
Impaired peripheral circulation e.g. Raynaud's
Systemic disease: hyper- and hypothyroidism, reactive arthritis, porphyria cutanea tarda
Sometimes a reaction to detergents (e.g. washing dishes with bare hands, using detergent-based shampoos or soaps).
Patients with hepatocellular dysfunction may develop hair-thinning or hair loss and nail changes such as clubbing,leukonychia (whitening), or onycholysis, affecting the nails of the hands and feet.^[4]

References

^ Freedberg; et al. (2003). Fitzpatrick's Dermatology in General Medicine (6th ed.). McGraw-Hill. p. 660. ISBN 0-07-138076-0.
^ Talley&O'Connor (2006). Clinical Examination A Systematic Guide to Physical Diagnosis (5th ed.). Elsevier. p. 262. ISBN 0-7295-3762-5.
^ Weber&Kelley (2010). Health Assessment in Nursing (4th ed.). Wolters Kluwer Health and Lippincott, Williams & Wilkins. p. 193. ISBN 978-0-7817-8160-2.
^ Hazin, Ribhi; Tamimi, Tarek I. Abu-Rajab; Abuzetun, Jamil Y.; Zein, Nizar N. (10/01/2009). "Recognizing and treating cutaneous signs of liver disease". Cleveland Clinic Journal of Medicine 76 (10): 599–606. doi:10.3949/ccjm.76A.08113. ISSN 0891-1150. PMID 19797460. Check date values in: |date= (help)

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UpToDate Contents

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1. 爪疾患の概要 overview of nail disorders
2. 爪真菌症 onychomycosis
3. 従来の癌の化学療法による皮膚合併症 cutaneous complications of conventional chemotherapy agents
4. 頭部白癬 tinea capitis
5. 爪乾癬 nail psoriasis

English Journal

Nail digital dermoscopy (Onychoscopy) in the diagnosis of onychomycosis.

Piraccini BM, Balestri R, Starace M, Rech G.SourceDivision of Dermatology, Department of Internal Medicine, Aging and Nephrological Diseases, University of Bologna, Bologna, Italy.
Journal of the European Academy of Dermatology and Venereology : JEADV.J Eur Acad Dermatol Venereol.2013 Apr;27(4):509-13. doi: 10.1111/j.1468-3083.2011.04323.x. Epub 2011 Nov 1.
Background Distal subungual onychomycosis and traumatic onycholysis are the most common causes of toenail abnormalities, and differential diagnosis is often impossible without mycology. Objectives To identify and describe dermoscopic signs specific for distal subungual onychomycosis that could
PMID 22040510

Sarcoid and the nail: review of the literature.

Momen SE, Al-Niaimi F.SourceDepartment of Medicine, Croydon University Hospital, London, UK. sophie.momen@doctors.org.uk
Clinical and experimental dermatology.Clin Exp Dermatol.2013 Mar;38(2):119-24; quiz 125. doi: 10.1111/j.1365-2230.2012.04470.x. Epub 2013 Feb 1.
Nail involvement in sarcoidosis is rare, but its presence is often associated with chronic systemic disease. We have reviewed all 33 reported cases of nail involvement with sarcoidosis, including our own case. Nail changes in sarcoidosis, while rare, can include dystrophy (n=10, 30%), onycholysis (n
PMID 23368092

Japanese Journal

爪と健康 (教育セミナーアクセサリーオーガンとオーラルケアの香粧品学 : エチケットのサイエンス)

衛藤光
日本香粧品学会誌 36(2), 119-124, 2012-06
NAID 40019389987

生検にて診断できた爪カンジダ症の2例

小林憲,澤田美月,二宮淳也,石崎純子,原田敬之,田中勝
日本医真菌学会雑誌 = Japanese journal of medical mycology 50(4), 253-257, 2009-10-30
症例１：81歳，男．約１年前，右第２指の爪甲剥離が出現した．症例２：81歳，女．気管支喘息でステロイド，高血圧でCa拮抗薬を内服中．初診の数ヵ月前より右第２，３指の掻痒を自覚し，爪甲変形も出現した．いずれも初診時の鏡検では菌要素陰性であり，病変部爪甲の生検にて爪甲中層から深層に白癬菌類似の菌要素を証明した．培養にてCandida albicansを分離同定した．症例１はイトラコナゾール100mg/ …
NAID 10026094621

Related Pictures

★リンクテーブル★

リンク元	「爪甲剥離症」「爪甲離床症」

「爪甲剥離症」

Onycholysis
	Classification and external resources
	Left hand onycholysis: ring and little fingers affected
ICD-10	L60.1
ICD-9	703.8
DiseasesDB	9236
MeSH	D054039

　　[★]

英: schizonychia, onycholysis
同: 爪甲離床症、つめ剥離症

[show details]

爪甲離床症 : 約 2,420 件
爪甲剥離症 : 約 25,300 件

「爪甲離床症」

　　[★]

英: onycholysis
関: 爪甲剥離症

[1] Freedberg; et al. (2003). Fitzpatrick's Dermatology in General Medicine (6th ed.). McGraw-Hill. p. 660. ISBN 0-07-138076-0.

[2] Talley&O'Connor (2006). Clinical Examination A Systematic Guide to Physical Diagnosis (5th ed.). Elsevier. p. 262. ISBN 0-7295-3762-5.

[3] Weber&Kelley (2010). Health Assessment in Nursing (4th ed.). Wolters Kluwer Health and Lippincott, Williams & Wilkins. p. 193. ISBN 978-0-7817-8160-2.

[4] Hazin, Ribhi; Tamimi, Tarek I. Abu-Rajab; Abuzetun, Jamil Y.; Zein, Nizar N. (10/01/2009). "Recognizing and treating cutaneous signs of liver disease". Cleveland Clinic Journal of Medicine 76 (10): 599–606. doi:10.3949/ccjm.76A.08113. ISSN 0891-1150. PMID 19797460. Check date values in: |date= (help)

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案内

onycholysis