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High levels of rheumatoid factor (in general, above 20 IU/mL, 1:40, or over the 95th percentile; there is some variation among labs) occur in rheumatoid arthritis (present in 80%) and Sjögren's syndrome (present in 50-70% of primary forms of disease). [11] The higher the level of RF the greater the probability of destructive articular disease.
Rheumatoid arthritis ( RA) is a long-term autoimmune disorder that primarily affects joints. [1] It typically results in warm, swollen, and painful joints. [1] Pain and stiffness often worsen following rest. [1] Most commonly, the wrist and hands are involved, with the same joints typically involved on both sides of the body. [1]
Rheumatic fever. Genetic factors, malnutrition and poverty. [ 1] Rheumatic fever ( RF) is an inflammatory disease that can involve the heart, joints, skin, and brain. [ 1] The disease typically develops two to four weeks after a streptococcal throat infection. [ 2] Signs and symptoms include fever, multiple painful joints, involuntary muscle ...
t. e. Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry ...
Rheumatism [2] or rheumatic disorders are conditions causing chronic, often intermittent pain affecting the joints or connective tissue. [3] Rheumatism does not designate any specific disorder, but covers at least 200 different conditions, including arthritis and "non-articular rheumatism", also known as "regional pain syndrome" or "soft tissue ...
Juvenile idiopathic arthritis ( JIA ), formerly known as juvenile rheumatoid arthritis ( JRA ), [ 1] is the most common chronic rheumatic disease of childhood, affecting approximately 3.8 to 400 out of 100,000 children. [ 3] Juvenile, in this context, refers to disease onset before 16 years of age, while idiopathic refers to a condition with no ...
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