Onycotrychia?: subungual hair follicle as another cause of longitudinal melanonychia or pigmentation – Hair follicle as cause of melanonychia

Ferreira, Olga; Baudrier, Teresa; Mota, Alberto; Cruz, M.C.; Guimarães, Marcos Duarte; Magalhães, José Pedro; Azevedo, Filomena

doi:10.1111/j.1468-3083.2010.03620.x

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Onychotrychia can be treated with CO2 laser with good result (46). Onychotrychia is an ectopic hair follicle and shaft growing within the nail plate.…”

Section: Dyschromiasmentioning

confidence: 99%

“…Of these, melanonychia is the most common and the most concerning. Nonneoplastic causes of melanonychia include hematoma, infections, foreign material, drugs, systemic diseases, Laugier Hunziker syndrome, nutritional deficiency, ethnic nail pigmentation, and postinflammatory hyperpigmentation (43,46). Neoplastic causes include subungual Bowen's disease, SCC, and melanocytic proliferations such as lentigenes, melanocytic nevi, and melanoma (43).…”

Section: Dyschromiasmentioning

confidence: 99%

“…The hair shaft was highlighted with a cytokeratin 19 stain to identify the outer root sheath. Onychotrychia can be treated with CO2 laser with good result (46).…”

Section: Dyschromiasmentioning

confidence: 99%

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Update: nail unit dermatopathology

Stewart

Rubin

2012

Dermatol Ther

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Nail unit dermatopathology is a growing field filled with many challenges. Many advances in this field have been made in the last 5 years. This review article provides an update on new information and studies published in that period of time. We divided these works into different sections, including clinical and pathologic challenges in diagnosis and treatment of nail disorders, nail unit biopsy and processing techniques, normal nail unit histology, nail plate structural and growth pathology, metabolic disease, inflammatory conditions, onychomycosis, benign growths, malignant growths, and dyschromias. Specific highlights include advances in the marking and orientation of nail unit biopsies for improved histologic interpretation, improved nail plate softening techniques, new methods for histologic evaluation of onychomycosis, descriptions of newly described benign growths unique to the nail unit, and the morphologic and immunohistochemical distinction between benign and malignant pigmented lesions of the nail unit.

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“…Onychotrychia can be treated with CO2 laser with good result (46). Onychotrychia is an ectopic hair follicle and shaft growing within the nail plate.…”

Section: Dyschromiasmentioning

confidence: 99%

Section: Dyschromiasmentioning

confidence: 99%

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Update: nail unit dermatopathology

Stewart

Rubin

2012

Dermatol Ther

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“…As far as we know, only three other cases of subungual hair were previously published in literature, two of them in children and one in a 37-year-old female. [3][4][5] Ectopic hair growth has been rarely reported in areas that do not contain hair follicles such as the glans penis and gingiva. 4 The cause for subungual growth of a hair follicle is not defined but a developmental hamartomatous origin of such folliculogenesis is the most likely reason.…”

Section: Subungual Ectopic Hair Studied By Scanning Electron Microscopymentioning

confidence: 99%

Subungual ectopic hair studied by scanning electron microscopy

Vasconcelos

Goyri-O’Neill

Soares‐Almeida

et al. 2014

Acad Dermatol Venereol

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“…Onycotrychia has been recently described by Ferreira et al [9] as a growth of hair follicle longitudinally underneath the nail plate. Their patient presented with single longitudinal brownish ridge of the right thumb nail plate evolving for last three months.…”

Section: New Entities Describedmentioning

confidence: 99%