Steatocystoma Multiplex appear as multiple, uniform, yellow, cystic papules usually 2-6 mm diameter, located especially on upper anterior trunk, upper arms, axillae, and thighs. Typically no central punctum or umbilication is seen. Majority of cases present with dermal lesions, but multiple subcutaneous masses looking like multiple lipomas can be present. Bumps usually appear in adolescence or early adulthood, probably because sebaceous activity is at its peak. Sometimes larger steatocystomas are prone to rupture and suppuration and can cause scarring and pain.
Steatocytomas typically contain a syrup-like, yellowish , odorless, oily material. If they are inflamed or infected by bacteria, they can develop a foul odor and can be a definite source of social isolation.
This is probably the closest thing to a “sebaceous cyst”, a name that many people including non dermatologist physicians may use to describe an epidermoid cyst which we see more commonly. Steatocystoma may at times have vellus hairs, and eruptive vellus hair cysts may have sebaceous glands (oil glands) in their lining, which leads some dermatologists to believe these two conditions may lie along a continuum, that they may be related.
Treatment is removal with small incisions and extraction, with care on treatment on the trunk because of the increased chance of poor cosmetic result/scarring.
A blackhead is also called an open comedo (single for comedone), and it is a clogged pore in the skin that is open to the air. Keratin (skin protein) and sebum (oil) combine to block the pore. They are often found on the face and trunk. but they can be found anywhere on the body. Blackheads are not clogged with dirt, but it is the exposure to air that causes oxidation turning the internal contents black. They can be extracted using a comedone extractor. I usually use an 11 blade (a blade that comes to a sharp point) and a Shaumberg type comedone extractor.
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This video may contain dermatologic surgical and/or procedural content. The content seen in this video is provided only for medical education purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.