What is scleredema?
Scleredema is a type of cutaneous mucinosis of unknown cause.
Who gets scleredema?
Scleredema affects adults. In many cases, people with scleredema have an underlying systemic disease. These include:
- Diabetes mellitus
- Sjögren syndrome
- Rheumatoid arthritis
- Multiple myeloma
- Malignant insulinoma
- HIV infection.
What is the cause of scleredema?
This is unknown.
What are the clinical features of scleredema?
Scleredema presents with symmetrical hardening and thickening of the skin. The affected areas are firm and woody plaques, sometimes slightly red or brown and often with a ‘peau d'orange’ (orange-skin) appearance. The face may appear expressionless and there can be difficulty opening the mouth.
There are three types of scleredema. All three types of scleredema can restrict movement, but otherwise seldom have serious consequences. Occasionally swallowing and speech can be affected and other organs involved – eyes, tongue, parotid gland, muscles, joints and heart.
Type 1 scleredema
Type one is the acute type of scleredema, and typically starts with an infection, most often Streptococcus pyogenes, the cause of tonsillitis. It mainly affects middle aged women and children. Hardening of the skin of the face and neck quickly develops and spreads to the upper trunk and arms. It usually improves spontaneously over six months to two years.
Type 2 scleredema
Type 2 scleredema is not associated with infection. It starts more slowly and persists. Abnormal levels of an abnormal paraprotein (immunoglobulin) in the blood may occur, sometimes due to multiple myeloma.
Type 3 scleredema
Type 3, scleredema adultorum of Buschke, also called scleredema diabeticorum, occurs in diabetics, particularly adult men. It is very persistent. The skin of the neck and upper back slowly thickens over months or years.
*Images provided by Dr Eugene Tan, Melbourne, Australia.
How is scleredema diagnosed?
The diagnosis is confirmed by skin biopsy, which shows mucin deposits between collagen bundles in the dermis.
What is the treatment for scleredema?
The best way to treat scleredema is unknown, because of its rarity. Some benefit has been reported with the following: