Ann Dermatol.  2008 Mar;20(1):11-13. 10.5021/ad.2008.20.1.11.

Two Pilosebaceous Cysts with Apocrine Hidrocystoma in One Biopsy Site: A Spectrum of the Same Disease Process?

• Hwang SW
• Cho KJ
• Oh DJ
• Lee D
• Kim JW
• Park SW

• KMID: 2156352
• DOI: http://doi.org/10.5021/ad.2008.20.1.11

Abstract

A 28-year-old woman presented with multiple, asymptomatic, erythematous to bluish papules located on the chest. Histopathologically, three round, well defined cystic structures were seen on the upper and lower dermis. The first cyst was milia, the second was apocrine hidrocystoma and the other, largest cyst was an eruptive vellus hair cyst (EVHC). A diagnosis of multiple pilosebaceous cysts combined with apocrine hidrocystoma was made. Since the milia and EVHC originate from the pilosebaceous unit, and the apocrine duct opens to the pilosebaceous orifice, we suggest that they can occur simultaneously in the same unit.

Keyword

Apocrine hidrocystoma; Eruptive vellus hair cyst; Pilosebaceous cyst

MeSH Terms

Adult
Biopsy
Dermis
Female
Hair
Hidrocystoma
Humans
Thorax

Figure

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  Fig. 1 Smooth surfaced, slightly erythematous, bluish papules on the chest; inset: close up view of the papule.

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  Fig. 2 (A) Histologic examination of the lesion showed round, well defined multiple cystic structures on the upper and lower dermis (H&E, × 12.5). (B) The upper cyst is composed of several layers of squamous and granular layer and filled with horny material arranged in laminated layers (H&E, × 200). (C) The cyst wall is lined by secretory cells showing decapitation secretion (H&E, × 200). (D) The cyst wall is lined by stratified squamous cell epithelium and the lumen contains vellus hair shaft (H&E, × 200).

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