EK70.0 Epidermoid cyst

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

A cutaneous cyst with an epidermoid wall filled with keratin and its breakdown products. It most commonly forms as the result of squamous metaplasia in a damaged sebaceous gland but may result from trauma (traumatic inclusion cyst), especially when situated on the extremities. It typically presents as a spherical skin-coloured or yellowish nodule, often with a central pore opening onto the skin surface.

inclusions

• Epidermal inclusion cyst

sections/codes in this section (EK70.0-EK70.0)

• Infected epidermoid cyst  (EK70.00)
• Epidermoid cyst, unspecified  (EK70.0Z)

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