Sebaceous cyst removal. Gloved hands of a surgeon removing a sebaceous cyst from a patient's back. A sebaceous cyst is formed as a result of blockage of a sebaceous (oil-forming) gland in the skin. Such cysts, which contain a smooth, yellow cheesy material are harmless but may grow very large or become infected and painful. They are removed through a small incision in the skin and provided the entire cyst wall is removed recurrence is rare.
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