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Pilar cyst in Adult
See also in: Hair and Scalp
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Pilar cyst in Adult

See also in: Hair and Scalp
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Contributors: Noah Craft MD, PhD, Lindy P. Fox MD, Lowell A. Goldsmith MD, MPH
Other Resources UpToDate PubMed

Synopsis

Pilar (trichilemmal) cysts, sometimes referred to as wens, are common cysts of hair follicle origin that are most often found on the scalp. The cysts are smooth and mobile, keratin filled, and may or may not be tender. Histologically, they are lined with multilayered epithelium that does not mature through a granular layer. They occur most commonly in middle-aged women.

Pilar cysts may be inherited as an autosomal dominant trait. Rarely these cysts form proliferating pilar tumors (more commonly called proliferating trichilemmal cysts), which are benign but may be locally aggressive. Malignant transformation is very rare.

Codes

ICD10CM:
L72.11 – Pilar cyst

SNOMEDCT:
254677004 – Pilar cyst

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Therapy

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Last Updated: 09/27/2019
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Pilar cyst in Adult
See also in: Hair and Scalp
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Pilar cyst : Cyst, Scalp, Firm nodule
Clinical image of Pilar cyst
A yellowish nodule with overlying diminished hair growth on the scalp.
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