What is (are) Familial mixed cryoglobulinemia ?
Familial mixed cryoglobulinemia is a rare condition that is characterized by the presence of abnormal proteins (called cryoglobulins) in the blood. These proteins clump together into a "gel-like" consistency at low temperatures, which can lead to inflammation, blocked blood vessels, and a variety of health problems. The associated signs and symptoms vary from person to person depending on which parts of the body or organ systems are affected; however, common features include purpura, joint pain, breathing problems, muscle pain, fatigue, glomerulonephritis, Raynaud's phenomenon, and skin abnormalities. The underlying genetic cause of familial mixed cryoglobulinemia is currently unknown. Although there are only a few reported families with this condition, it appears to be inherited in an autosomal dominant manner. Treatment is based on the signs and symptoms present in each person. In severe cases, medications that suppress the immune system may be necessary.