ContentsSynopsisCodesLook ForDiagnostic PearlsDifferential Diagnosis & PitfallsBest TestsManagement PearlsTherapyReferencesView all Images (22)
Eruptive vellus hair cyst in Adult
Other Resources UpToDate PubMed

Eruptive vellus hair cyst in Adult

Contributors: David O'Connell MD, Chris G. Adigun MD, David Dasher MD, Susan Burgin MD
Other Resources UpToDate PubMed

Synopsis

Eruptive vellus hair cysts (EVHCs) refers to the typical presentation of vellus hair cysts as multiple lesions as opposed to the less commonly occurring solitary vellus hair cyst. EVHCs present as multiple, small (1-4 mm), flesh-colored to hyperpigmented follicular papules on the chest and upper abdomen. They may also occur on the proximal extremities, including axillae and buttocks, and have been reported on the face, including eyelids, and genital areas. They are usually asymptomatic but may be pruritic. They may become inflamed, and occasionally transepidermal elimination of cyst contents may occur.

The etiology of EVHCs is unknown. It is thought that a developmental anomaly predisposes to follicular occlusion of vellus hairs, leading to subsequent cystic dilatation of the affected follicle. EVHCs generally occur sporadically but may be inherited in an autosomal dominant fashion or associated with a number of other disorders, including steatocystoma multiplex, trichostasis spinulosa, anhidrotic ectodermal dysplasia, pachyonychia congenita, Lowe syndrome and other neurological disorders, and chronic renal failure. An occurrence of forehead lesions has been reported with use of minoxidil 3% applied to the scalp.

EVHCs characteristically present from childhood through adolescence into early adulthood. Some cases have been reported in elderly patients. Familial cases appear to have an earlier age of onset, with some lesions noted in infancy and even at birth. No predilection in any race / ethnicity or sex has been established.

Codes

ICD10CM:
L72.8 – Other follicular cysts of the skin and subcutaneous tissue

SNOMEDCT:
254685008 – Eruptive vellus hair cysts

Look For

Subscription Required

Diagnostic Pearls

Subscription Required

Differential Diagnosis & Pitfalls

Best Tests

Subscription Required

Management Pearls

Subscription Required

Therapy

Subscription Required

References

Subscription Required

Last Reviewed:08/03/2021
Last Updated:08/05/2021
Copyright © 2021 VisualDx®. All rights reserved.
Eruptive vellus hair cyst in Adult
Eruptive vellus hair cyst : Abdomen, Superior chest, Smooth papules, Multiple cysts
Clinical image of Eruptive vellus hair cyst
A close-up of several skincolored papules with tiny central puncta.
Copyright © 2021 VisualDx®. All rights reserved.