Skin tumor - Nonmelanocytic - Dermoid cyst (cutaneous)

Home Chapter Home Jobs Conferences Fellowships Books

Skin - Nonmelanocytic tumors

Cysts

Dermoid cyst (cutaneous)

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
=========================================================================

● Resembles keratinous cysts of epidermal type, but also have hair adnexae
● Usually face of children along embryonic closure lines, diagnosis sometimes later

Case reports
=========================================================================

● 48 year old man with left postauriclar cyst, 31 year old woman with right postauricular cyst (Oncol Rep 2006;16:295)

Gross description
=========================================================================

● Cystic lesion of head and neck

Clinical images
=========================================================================

5 mm midline cyst with overlying scar

Excision of cyst

Micro description
=========================================================================

● Lined by stratified squamous epithelium, adnexal structures, keratin in lumen

Micro images
=========================================================================

Unilocular cyst within the dermis connects with multiple pilosebaceous units; surrounding dermis is mildly fibrotic, cyst lining is stratified and squamous

Positive stains
=========================================================================

● Suprabasal layer: CK1 and CK10
● Basal layer: CK14
● Sebaceous gland-like areas: CK14+ in sebaceous acinus
● Sebaceous duct: CK17

Differential diagnosis
=========================================================================

● Follicular cyst (infundibular type)
● Vellus hair cyst
● Steatocystoma

End of Skin - Nonmelanocytic tumors > Cysts > Dermoid cyst (cutaneous)

This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at copyrightPathOut@gmail.com with any questions (click here for other contact information).