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Since the first description of cryoglobulinemia in association with the clinical triad of skin purpura, joint pain, and weakness by Meltzer et al. in 1966, [4] [5] the percentage of cryoglobulinemic diseases described as essential cryoglobulinemia or idiopathic cryoglobulinemia (that is, cryoglobulinemic disease that is unassociated with an underlying disorder) has fallen.
In contrast, type I cryoglobulinemia causes damage solely due to hyperviscosity syndrome, which refers to the aggregation and resulting obstructing nature of cryoglobulins in blood vessels resulting in reduced perfusion of tissues and possibly necrosis if prolonged. Therefore, vasculitis generally occurs only in patients affected by mixed (type ...
Cryoglobulins type II and III, also known as mixed cryoglobulinemia, are composed of polyclonal immunoglobulin (Ig)G and either monoclonal IgM or both with rheumatoid factor activity. The disease can present with a wide range of symptoms, from minor ones like fatigue , purpura , or arthralgia to more serious ones like glomerulonephritis and ...
Cryofibrinogenemia refers to a condition classified as a fibrinogen disorder in which a person's blood plasma is allowed to cool substantially (i.e. from its normal temperature of 37 °C to the near-freezing temperature of 4 °C), causing the (reversible) precipitation of a complex containing fibrinogen, fibrin, fibronectin, and, occasionally, small amounts of fibrin split products, albumin ...
Apart from myelin-directed antibodies, other serum components that can cause demyelination as well as conduction block include complement, cytokines, and other inflammatory mediators. Individuals with chronic inflammatory demyelinating polyneuropathy have a low frequency of specific antibodies, which suggests that different antibodies and ...
Other immune-mediated hematological disorders, such as essential mixed cryoglobulinemia and aplastic anemia have been described as part of the extrahepatic manifestations of HBV infection, but their association is not as well-defined; therefore, they probably should not be considered etiologically linked to HBV. [28]
Cold agglutinins are antibodies, typically immunoglobulin M (), that are acquainted with and then binding the antigens on red blood cells, typically antigens "I" or "i" on the RBC surface, [1] in the environment in which the temperatures are lower than normal core body temperature and, thus, ends up leading to agglutinations of the red blood cells and hemolysis reaction occurring outside the ...
The Kasukawa criteria require a minimum of one of the common symptoms, a positive anti-RNP antibody, as well as one or more symptoms of the mixed symptoms in at least two of the three disease categories to qualify for a diagnosis of MCTD. [69] It has a sensitivity of 75% [70] and a specificity of 99.8%. [32] Common symptoms: [69] Raynaud's ...