Beau's lines

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Beau's lines Classification and external resources
ICD-10	L60.4
ICD-9	703.8

WikiDoc Resources for Beau's lines
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Most recent articles on Beau's lines Most cited articles on Beau's lines Review articles on Beau's lines Articles on Beau's lines in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Beau's lines Images of Beau's lines Photos of Beau's lines Podcasts & MP3s on Beau's lines Videos on Beau's lines
Evidence Based Medicine
Cochrane Collaboration on Beau's lines Bandolier on Beau's lines TRIP on Beau's lines
Clinical Trials
Ongoing Trials on Beau's lines at Clinical Trials.gov Trial results on Beau's lines Clinical Trials on Beau's lines at Google
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Blogs on Beau's lines
Definitions
Definitions of Beau's lines
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Overview

Beau's lines are deep grooved lines that run from side to side on the fingernail. They may look like indentations or ridges in the nail plate. Beau's lines are the result of a temporary cessation of cell division in the nail matrix. This may be caused by an infection or problem in the nail fold, where the nail begins to form, or it may be caused by an injury to that area or a systemic process.

History

This condition of the nail was named by a French physician, Joseph Honoré Simon Beau (1806–1865), who first described it in 1846.

Complete Differential Diagnosis of Causes of Beau's Lines (alphabetical):

• Chemotherapy particularly cytotoxic agents
• Dermatologic disorders
• Diabetes
• Drugs
• Hypocalcemia
• Malnutrition
• Trauma

Complete Differential Diagnosis of Causes of Beau's Lines (by organ system):

Cardiovascular	No underlying causes
Chemical / poisoning	No underlying causes
Dermatologic	Multiple underlying causes
Drug Side Effect	Multiple underlying causes, most notably chemotherapy
Ear Nose Throat	No underlying causes
Endocrine	Diabetes
Environmental	No underlying causes
Gastroenterologic	No underlying causes
Genetic	No underlying causes
Hematologic	No underlying causes
Iatrogenic	No underlying causes
Infectious Disease	No underlying causes
Musculoskeletal / Ortho	No underlying causes
Neurologic	No underlying causes
Nutritional / Metabolic	Malnutrition
Obstetric/Gynecologic	No underlying causes
Oncologic	Chemotherapy
Opthalmologic	No underlying causes
Overdose / Toxicity	Chemotherapy
Psychiatric	No underlying causes
Pulmonary	No underlying causes
Renal / Electrolyte	Hypocalcemia
Rheum / Immune / Allergy	No underlying causes
Sexual	No underlying causes
Trauma	Trauma in general and to the nail in particular
Urologic	No underlying causes
Miscellaneous	Deep sea diving

Physical examination

Nail bed: Beau's lines should be distinguished from Muehrcke's lines of the fingernails. While Beau's lines are actual ridges and indentations in the nail plate, Muehrcke's lines are areas of hypopigmentation without palpable ridges.

Recent Research on Beau's Lines

A researcher found Beau's lines in the fingernails of 6 divers following a deep saturation dive to a pressure equal to 335 meters of sea water, and in 2 of 6 divers following a similar dive to 305 meters.^[1]

References

External links

• Image of Beau's Lines at Johns Hopkins University
• Images of Beau's Lines

v • d • e Diseases of the skin and subcutaneous tissue (integumentary system) (L, 680-709)
Infections	Bacterial skin disease Staphylococcus (Staphylococcal scalded skin syndrome, Impetigo, Boil, Carbuncle) · Strep (Impetigo) · Corynebacterium (Erythrasma) Viral skin disease Wart · Molluscum contagiosum · Erythema infectiosum · Exanthema subitum · Herpes simplex (Herpetic whitlow) General Cellulitis (Paronychia) · Acute lymphadenitis · Pilonidal cyst · Pimple (Pustule)
Bullous disorders	acantholysis (Pemphigus, Transient acantholytic dermatosis) · Pemphigoid (Bullous, Cicatricial, Gestational) · Dermatitis herpetiformis
Inflammatory	Dermatitis and eczema Atopic dermatitis · Seborrhoeic dermatitis (Dandruff, Cradle cap) · Contact dermatitis (Diaper rash, Urushiol-induced contact dermatitis) · Erythroderma · Lichen simplex chronicus/Prurigo nodularis · Itch (Pruritus ani) · Nummular dermatitis · Dyshidrosis · Pityriasis alba Papulosquamous disorders Psoriasis (Psoriatic arthritis) · Parapsoriasis (Pityriasis lichenoides et varioliformis acuta, Pityriasis lichenoides chronica, Lymphomatoid papulosis) · other pityriasis (Pityriasis rosea, Pityriasis rubra pilaris) · other lichenoid (Lichen planus, Lichen nitidus) Urticaria Dermatographic urticaria · Cold urticaria · Cholinergic urticaria Erythema Erythema multiforme/drug eruptions: Stevens-Johnson syndrome · Toxic epidermal necrolysis · Erythema nodosum Other erythema: Erythema annulare centrifugum · Erythema marginatum · Necrolytic migratory erythema · Erythema toxicum
Radiation-related disorders	Sunburn · actinic rays (Actinic keratosis, Actinic cheilitis) · Polymorphous light eruption (Acne aestivalis) · Radiodermatitis · Erythema ab igne
Pigmentation disorder	hypopigmentation (Albinism, Vitiligo) · hyperpigmentation (Melasma, Freckle, Café au lait spot, Lentigo/Liver spot, Acanthosis nigricans, Acral acanthotic anomaly)
Other skin	keratosis/hyperkeratosis (Seborrheic keratosis, Callus) · other epidermal thickening (Ichthyosis acquisita, Palmoplantar keratoderma) skin ulcer (Pyoderma gangrenosum, Bedsore) Cutaneous Markers of Internal Malignancy (Florid cutaneous papillomatosis, acanthosis nigricans, sign of Leser-Trelat) atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) necrobiosis (Granuloma annulare, Necrobiosis lipoidica) · other granuloma (Granuloma faciale, Pyogenic granuloma) cutaneous vasculitis (Livedoid vasculitis, Erythema elevatum diutinum)
Connective tissues	collagen disease: Keloid localized connective tissue disorders: Lupus erythematosus (Discoid lupus erythematosus, Subacute cutaneous lupus erythematosus) · Scleroderma/Morphea · Linear scleroderma · Calcinosis cutis · Sclerodactyly · Ainhum
see also congenital, neoplasia

v • d • e Eponymous medical signs for integumentary and musculoskeletal systems
Integumentary system	Auspitz's sign - Crowe sign - Darier's sign - Koebner's phenomenon - Leser-Trelat sign - Nikolsky's sign - Wickham striae nails (Beau's lines, Terry's nails)
Musculoskeletal system	Aschoff body - Bouchard's nodes/Heberden's node - Finkelstein's test - Gottron's papules - Waddell's signs - Schober test - hip dysplasia (Barlow's maneuver) Orthopedics (Apley grind test, Lachman test, McMurray test, Simmonds' test, O'Donoghue's triad) Gorlin sign Codman triangle Trendelenburg gait/Trendelenburg's sign Adson's sign Wilson's test

v • d • e WikiDoc Research Resources for Beau's lines
Articles on Beau's lines	Most recent articles on Beau's lines • Most cited articles on Beau's lines • Review articles on Beau's lines • Articles on Beau's lines in N Eng J Med, Lancet, BMJ
Media (Slides, Video, Images, MP3) on Beau's lines	Powerpoint slides on Beau's lines • Images of Beau's lines • Photos of Beau's lines • Podcasts & MP3s on Beau's lines • Videos on Beau's lines
Evidence Based Medicine Regarding Beau's lines	Cochrane Collaboration on Beau's lines • Bandolier on Beau's lines • TRIP on Beau's lines
Cost Effectiveness of Beau's lines	Cost Effectiveness of Beau's lines
Clinical Trials Involving Beau's lines	Ongoing Trials on Beau's lines at Clinical Trials.gov • Trial results on Beau's lines • Clinical Trials on Beau's lines at Google
Guidelines / Policies / Government Resources (FDA/CDC) Regarding Beau's lines	US National Guidelines Clearinghouse on Beau's lines • NICE Guidance on Beau's lines • NHS PRODIGY Guidance • FDA on Beau's lines • CDC on Beau's lines
Textbook Information on Beau's lines	Books and Textbook Information on Beau's lines
Pharmacology Resources on Beau's lines	Dosing of Beau's lines • Drug interactions with Beau's lines • Side effects of Beau's lines • Allergic reactions to Beau's lines • Overdose information on Beau's lines • Carcinogenicity information on Beau's lines • Beau's lines in pregnancy • Pharmacokinetics of Beau's lines •
Genetics, Pharmacogenomics, and Proteinomics of Beau's lines	Genetics of Beau's lines • Pharmacogenomics of Beau's lines • Proteomics of Beau's lines
Newstories on Beau's lines	Beau's lines in the news • Be alerted to news on Beau's lines • News trends on Beau's lines
Commentary on Beau's lines	Blogs on Beau's lines
Patient Resources on Beau's lines	Patient resources on Beau's lines • Discussion groups on Beau's lines • Patient Handouts on Beau's lines • Directions to Hospitals Treating Beau's lines • Risk calculators and risk factors for Beau's lines
Healthcare Provider Resources on Beau's lines	Symptoms of Beau's lines • Causes & Risk Factors for Beau's lines • Diagnostic studies for Beau's lines • Treatment of Beau's lines
Continuing Medical Education (CME) Programs on Beau's lines	CME Programs on Beau's lines
International Resources on Beau's lines	Beau's lines en Espanol • Beau's lines en Francais
Business Resources on Beau's lines	Beau's lines in the Marketplace • Patents on Beau's lines
Informatics Resources on Beau's lines	List of terms related to Beau's lines