Epidermoid cyst in Adult
See also in: Anogenital,Hair and ScalpAlerts and Notices
Synopsis

Epidermoid cysts are benign and usually asymptomatic, but they may be painful if ruptured or infected. Rarely, malignancies such as basal cell carcinoma, squamous cell carcinoma, and mycosis fungoides have developed within these cysts.
Codes
ICD10CM:L72.0 – Epidermal cyst
SNOMEDCT:
419893006 – Epidermoid cyst
Look For
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Diagnostic Pearls
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Differential Diagnosis & Pitfalls
- Pilar cyst (trichilemmal cyst) – most commonly located on the scalp; usually has a firmer consistency on palpation
- Lipoma
- Pilomatrixoma
- Abscess
- Eruptive vellus hair cyst
- Calcinosis cutis
- Steatocystoma
- Rheumatoid nodule
- Dermoid cyst
- Branchial cleft cyst or thyroglossal duct cyst
- Proliferating trichilemmal tumor
- Mixed tumor
- Cutaneous metastatic malignancy
Best Tests
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Management Pearls
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Therapy
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References
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Last Reviewed:05/08/2017
Last Updated:06/20/2017
Last Updated:06/20/2017
Epidermoid cyst in Adult
See also in: Anogenital,Hair and Scalp