Skin tumor - Nonmelanocytic - Pigmented follicular cyst

Home Chapter Home Jobs Conferences Fellowships Books

Skin - Nonmelanocytic tumors

Cysts

Pigmented follicular cyst

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

● Variant of follicular (infundibular-type) cyst
● Hyperpigmented lesion with epidermal-type keratinization
● Contains laminated keratin, pigmented hair shafts, some growing hair follicles, usually head/neck

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

● 23 year old male with blue-black 0.5 cm nodule on neck (J Am Acad Dermatol 1989;21:1073)

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

● Solitary hyperpigmented nodule or dome-shaped papule, 0.4 to 1.5 cm in diameter

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

● Lined by squamous epithelium, sebaceous tissue
● Contains pigmented, medullated hair shafts

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

Medullated hair shafts in cyst lumen

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

● Dermoid cyst (cutaneous)
● Steatocystoma
● Vellus hair cyst (eruptive)

End of Skin - Nonmelanocytic tumors > Cysts > Pigmented follicular cyst

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).