Hair follicle nevus D23.L

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

Congenital vellus hair hamartoma; Hair follicle nevus; Nevus Hair follicle nevus; pilo-follicular nevus

Definition
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Very rare, benign, congenital, circumscribed hypertrichosis due to the multiplication of immature hair follicles. There is a clinical relation to the Becker nevus.

Etiopathogenesis
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Probably remains of embryonic hair germs.

Manifestation
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From birth or in early youth.

Localization
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Face, especially nose, nasolabial folds, chin, also ears.

Histology
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Numerous normally immature hair follicles that do not branch and contain small dystrophic hairs. The epidermis is slightly bulging and narrowed.

Therapy
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Excision if necessary.

Literature
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  1. Davis DA, Cohen PR (1996) Hair follicle naevus: Case report and review of literature. Pediatric Dermatol 13: 135-138
  2. Germain M et al (2002) Hair follicle nevus in a distribution following Blaskho's lines. J Am Acad Dermatol 46: S125-127
  3. Ikeda S et al (2003) A case of unilateral, systematized linear hair follicle nevi associated with epidermal nevus-like lesions. Dermatology 206: 172-174
  4. Kuwahara H et al (2001) Hair follicle nevus occurring in frontonasal dysplasia: an electron microscopic observation. J Dermatol 28: 324-328

Outgoing links (3)

Becker's nevus; Excision; Hypertrichoses;

Disclaimer

Please ask your physician for a reliable diagnosis. This website is only meant as a reference.

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Last updated on: 29.10.2020