Cyst - DermAtlas - Dermatology Image Atlas

Contributor

Greg Hosler, MD, PhD

Diagnosis

cyst

Body Site

arm

Age

58 years

Pigmentation

light

Organization

discrete

Color

pink

Morphology

nodule

Pattern

solitary

Comments

This is a typical histologic example of a pilar cyst, also called a trichilemmal cyst. This lesion was present on the arm of a 58-year-old woman. Typically, they present on the scalp. The differential diagnosis includes an epidermoid cyst; however, the keratin in the pilar cyst is compact and abruptly forms, without a granular layer.

Description

Histologic sections of skin show a cystic lesion within the dermis. The cyst contains a brightly eosinophilic lining with vaguely papillomatous projections into the lumen. The cyst contents are fluorescent pink with abundant crystalline material.

Image Added

1/20/2006 22:49:16

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Other Resources

PubMed Medline Plus Medscape

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