The sedimentation rate (sed rate) blood test measures how quickly red blood cells (erythrocytes) settle in a test tube. High sedimentation rates may be caused by:
* Autoimmune diseases, such as systemic lupus erythematosus or rheumatoid arthritis. * Cancer, such as lymphoma or multiple myeloma. * Chronic kidney disease. * Infection, such as pneumonia, pelvic inflammatory disease, or appendicitis. * Inflammation of joints (such as polymyalgia rheumatica) and blood vessels (such as giant cell arteritis). * Inflammation of the thyroid gland (Graves' disease). * Kidney, bone, joint, skin, or heart valve infections. * Pregnancy and preeclampsia (toxemia of pregnancy). * Viral infections.
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