Normal Pigmentation in the Nails of the Negro

Monash, Samuel

doi:10.1001/archderm.1932.01450020902012

Cited by 41 publications

(6 citation statements)

References 1 publication

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“…The incidence of melanonychia is significantly more in less than 30 years of age which is probably due to racial pigmentation in contrast to study by Monash et al [34] which says that 77% of Afro-Carribeans over 20 years of age have longitudinal melanonychia and the prevalence of which increases to almost 100% by 50 years. The incidence of melanonychia is significantly more in association with systemic disease than with only nails or in association with skin and/or hair.…”

Section: Onycholysis:-contrasting

confidence: 56%

To Study Nail Changes in Dermatology.

Mishra¹,

Saraswat²

2017

IJAR

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Section: Onycholysis:-contrasting

confidence: 56%

To Study Nail Changes in Dermatology.

Mishra¹,

Saraswat²

2017

IJAR

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“…Ethnic or racial nail pigmentations are physiological longitudinal pigmentations of the nail or nails observed in darkskinned individuals with skin type V and VI. 37,38 They can present as single or more often multiple bands involving one or more digits.…”

Section: Nail Pigmentation Of Melanocytic Originmentioning

confidence: 99%

Diagnosis and management of nail pigmentations

Braun

Baran

Gal

et al. 2007

Journal of the American Academy of Dermatology

265

243

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“…Melanin in the nail plate is composed of granules derived from matrix melanocytes [34]. Longitudinal melanonychia may be a benign phenomenon, particularly in Afro‐Caribbeans – 77% of black people will have a melanonychia by the age of 20 and almost 100% by 50 [35, 36]. The Japanese also have a high prevalence of longitudinal melanonychia, being present in 10–20% of adults [37].…”

Section: Regional Anatomy and Histologymentioning

confidence: 99%

Nail biology and nail science

Berker

André

Baran

2007

Intern J of Cosmetic Sci

145

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Synopsis The nail plate is the permanent product of the nail matrix. Its normal appearance and growth depend on the integrity of several components: the surrounding tissues or perionychium and the bony phalanx that are contributing to the nail apparatus or nail unit. The nail is inserted proximally in an invagination practically parallel to the upper surface of the skin and laterally in the lateral nail grooves. This pocket‐like invagination has a roof, the proximal nail fold and a floor, the matrix from which the nail is derived. The germinal matrix forms the bulk of the nail plate. The proximal element forms the superficial third of the nail whereas the distal element provides its inferior two‐thirds. The ventral surface of the proximal nail fold adheres closely to the nail for a short distance and forms a gradually desquamating tissue, the cuticle, made of the stratum corneum of both the dorsal and the ventral side of the proximal nail fold. The cuticle seals and therefore protects the ungual cul‐de‐sac. The nail plate is bordered by the proximal nail fold which is continuous with the similarly structured lateral nail fold on each side. The nail bed extends from the lunula to the hyponychium. It presents with parallel longitudinal rete ridges. This area, by contrast to the matrix has a firm attachment to the nail plate and nail avulsion produces a denudation of the nail bed. Colourless, but translucent, the highly vascular connective tissue containing glomus organs transmits a pink colour through the nail. Among its multiple functions, the nail provides counterpressure to the pulp that is essential to the tactile sensation involving the fingers and to the prevention of the hypertrophy of the distal wall tissue, produced after nail loss of the great toe nail.

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Normal Pigmentation in the Nails of the Negro

Cited by 41 publications

References 1 publication

To Study Nail Changes in Dermatology.

To Study Nail Changes in Dermatology.

Diagnosis and management of nail pigmentations

Nail biology and nail science

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