Sebaceous Cysts of the breast
Sebaceous cysts can form when the sebaceous glands become blocked. The sebaceous glands secrete ‘sebum’. Sebum is an oil that lubricates the hair and skin.
There are sebaceous glands in many areas of the body, but they are most abundant on the face and scalp. A sebaceous breast cyst is a type of epidermal cyst, that forms as a collection of keratin-like material.
Usually, a sebaceous breast cyst will have a small opening to the skin, but this may not be easily visible. Sebaceous cysts are most commonly found on the face, the back of the ears, back and torso. However, sebaceous cysts can also occur on the breast.
Symptoms of Sebaceous Cysts
Often, these type of cysts appear as small bumps or lumps just beneath the skin. Picture them as small, closed ‘sacs’, that contain keratin. Keratin is a protein that protects the skin cells from damage or stress.
Sometimes sebaceous cysts can smell foul, but often they have no odour. Because of their origin from skin-related tissue, they are also called epidermoid cysts. I suppose you could call them ‘skin cysts‘. Because these cysts may contain skin oils in the keratinized materials, the whitish contents can look shiny and feel slippery, sometimes.
Treatment of Sebaceous Breast Cysts
What causes skin cysts?
Skin cysts form when multiplying skin cells move inwards into the deeper, dermis layer of the skin. Usually the skin cells will move to the top layer of the skin (epidermis) and shed away.
Several factors cause sebaceous cysts and these include:-
- Blocked sebaceous or oil glands in the skin
- Swelling of the hair follicle or a hair that grows inwards
- Over production of the oil sebum
- Injury or burn to the skin
- Shaving and waxing
Are Sebaceous Breast Cysts linked with Cancer?
A cyst is a sac that contains, air, fluid or semi-solid material. In the case of the sebaceous cyst, the inside of the sac contains epidermoid material. Epideromoid material is wet and appears a bit like dandruff clumped together.
On the other hand a breast tumor is an abnormal mass of solid tissue. Cysts with solid material inside are a little more suspicious than air or fluid-filled ones. However, a biopsy will determine if any lump or bump is benign or cancerous.
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- Kalli S, Freer PE, Rafferty EA. Lesions of the skin and superficial tissue at breast MR imaging. Radiographics. (2010) 30 (7): 1891-913.
- Iglesias A, Arias M, Santiago P et-al. Benign breast lesions that simulate malignancy: magnetic resonance imaging with radiologic-pathologic correlation. Curr Probl Diagn Radiol. (april 2007)36 (2): 66-82.