Vellus Hair Cysts, Eruptive, Cyst - DermAtlas

Contributor

Greg Hosler, MD, PhD

Diagnosis

vellus hair cysts, eruptive cyst

Body Site

chest

Age

34 years

Pigmentation

medium

Organization

discrete

Color

skin color

Morphology

cyst

Pattern

solitary

Comments

This vellus hair cyst was an isolated lesion on a 34-year-old Asian male, and likely idiopathic. When multiple, they can be associated with eruptive vellus hair cysts, an autosomal dominant disorder. The chest and abdomen are common places for them. Histologically, they are distinctive, as they often have multiple vellus hairs within the cyst lumen, as in this case. Sometimes follicles are present in the cyst wall, supporting their follicular infundibulum derivation.

Description

At higher power of the same lesion, the cyst lining is thin and squamous. Within the lumen there are abundant thin vellus hairs, caught in cross-section.

Image Added

1/30/2006 22:57:48

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Other Resources

PubMed Medline Plus Medscape

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