Which of the following statements about Rheumatoid Factor is true ?
Correct Answer: It is an IgM antibody directed against IgG
Description: In rheumatoid ahritis it is suspected that antibodies plays a role in the disease. About80% of patients have serun IgM autoantibodies that bind to fc poion of their own self IgG. These antibodies are called rheumatoid factor. Ref :Robbins basic pathology 9th edition page no 784,green box=Pathogenesis
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Pathology
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