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Skin - Nonmelanocytic tumors

Cysts

Steatocystoma

Reviewer: Christopher Hale, M.D. (see Reviewers page)
Revised: 29 June 2012, last major update June 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.

General
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● Solitary (simplex, often scrotal) or disseminated (steatocystoma multiplex, autosomal dominant with keratin 17 mutations, dermal nodules 1-3 mm in upper arms, axilla, scrotum and presternal skin)

Case Reports
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● 25 year old man with nodules on arms and trunk (Dermatol Online J 2003;9:18)

Gross description
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● Cysts contain clear fluid

Gross images
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Various images

Micro description
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● Cyst with elaborate inner folding (crenulation) of cyst wall with undulations of thin layer of stratified squamous epithelium resembling ductal portion of sebaceous gland
● Also lobules of sebaceous glands and small hair follicles

Micro images
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Various images

Differential diagnosis
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● Dermoid cyst (cutaneous)
● Vellus hair cyst

End of Skin - Nonmelanocytic tumors > Cysts > Steatocystoma

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