Sebaceous Cyst
Alternate Names : Epidermal Cyst, Epidermoid Cyst, Keratin Cyst
Definition A sebaceous cyst is a closed sac found just under the skin containing "pasty" or "cheesy" looking skin secretions.
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Overview, Causes, & Risk Factors
Sebaceous cysts most often arise from swollen hair follicles. Skin trauma can also induce a cyst to form. A sac of cells is created into which a protein called keratin is secreted.
These cysts are usually found on the face, neck, and trunk. They are usually slow- growing, painless, freely movable lumps beneath the skin. Occasionally, however, a cyst will become inflamed and tender.
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