Korean J Dermatol.  2017 Jun;55(5):290-292.

Eruptive Vellus Hair Cysts in a Patient with Mental Retardation

Affiliations
  • 1Department of Dermatology, Myongji Hospital, Seonam University College of Medicine, Goyang, Korea. chg70@mjh.or.kr

Abstract

Eruptive vellus hair cysts (EVHCs) are small, red- or brown-colored cystic papules that usually occur on the chest and proximal extremities of children and adults. Histologically, these small cysts are observed in the mid-dermis and contain multiple hair shafts and keratinous material. Pathogenesis of EVHC has not been completely understood. A 40-year-old man with mental retardation presented with multiple bluish papules on his back. A biopsy specimen showed features of eruptive vellus hair cysts. We report a case of EVHC that occurred at an unusual site in a patient with mental retardation.

Keyword

Eruptive vellus hair cysts; Mental retardation

MeSH Terms

Adult
Biopsy
Child
Extremities
Hair*
Humans
Intellectual Disability*
Thorax
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