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What does it mean if muscle enzymes are too high in relation to rheumatoid arthritis?

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When muscle enzymes -- creatine phosphokinase (CPK) and aldolase -- are high, it indicates a possible inflammatory muscle disease. Higher levels of CPK can also be seen after trauma, injections into a muscle, muscle disease due to an underactive thyroid, and while taking certain medications such as cholesterol-lowering statin drugs.

SOURCES: American Association for Clinical Chemistry: "Rheumatoid Factor." National Institute of Arthritis and Musculoskeletal and Skin Diseases: "How is Rheumatoid Arthritis Diagnosed?" Arthritis Foundation: "Guide to Lab Tests."


Reviewed by Brunilda Nazario on April 09, 2018

SOURCES: American Association for Clinical Chemistry: "Rheumatoid Factor." National Institute of Arthritis and Musculoskeletal and Skin Diseases: "How is Rheumatoid Arthritis Diagnosed?" Arthritis Foundation: "Guide to Lab Tests."


Reviewed by Brunilda Nazario on April 09, 2018

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What are antineutrophil cytoplasmic antibodies in relation to rheumatoid arthritis?

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