Cryoglobulinemia is the presence of abnormal proteins in the blood. These abnormal proteins become thick or gel-like in cold temperatures.
Cryoglobulins are antibodies. It is not yet known why they become solid at low temperatures. When they do thicken or become somewhat gel-like, they can block blood vessels throughout the body. This may lead to complications ranging from skin rashes to kidney failure.
Cryoglobulinemia is part of a group of diseases that cause vasculitis -- damage and inflammation of the blood vessels throughout the body. The disorder is grouped into three main types, depending on the type of antibody that is produced:
Types II and III are also referred to as mixed cryoglobulinemia.
Type I cryoglobulinemia is most often related to cancer of the blood or immune systems.
Types II and III are most often found in people who have a chronic (long-lasting) inflammatory condition, such as an autoimmune disease or hepatitis C. Most patients with mixed cryoglobulinemia have a chronic hepatitis C infection.
Other conditions that may be related to cryoglobulinemia include:
Symptoms vary depending on the type of cryoglobulinemia and the organs that are affected. In general, symptoms may include:
The doctor will perform a physical exam. There may be signs of liver and spleen swelling.
Tests for cryoglobulinemia include:
Other tests may include:
Treatment of mild or moderate cryoglobulinemia depends on the underlying cause. Treating the cause will often treat the cryoglobulinemia.
Mild cases can be treated by avoiding cold temperatures.
Standard hepatitis C treatments usually work for patients who have hepatitis C and mild or moderate cryoglobulinemia. However, the condition can return when treatment stops.
Severe cryoglobulinemia (involves vital organs or large areas of skin) is treated with corticosteroids and other medications that suppress the immune system.
Treatment may also involve plasmapheresis. Plasmapheresis is a procedure in which blood plasma is removed from the circulation and replaced by fluid, protein, or donated plasma.
Cryoglobulinemia is not usually deadly. However, if the kidneys are affected, the outlook is poor.
Call your health care provider if:
There is no known prevention. Avoiding exposure to cold temperatures may prevent some symptoms.
Because so many cases of mixed cryoglobulinemia are associated with hepatitis C, prevention of hepatitis C infection may reduce your risk of cryoglobulinemia.
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Harris ED, Budd RC, Genovese MC, Firestein GS, Sargent JS, Sledge CB. Kelley's Textbook of Rheumatology. 7th ed. St. Louis, Mo: WB Saunders; 2005:1392-1393.
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