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What are antineutrophil cytoplasmic antibodies in relation to rheumatoid arthritis?

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Antineutrophil cytoplasmic antibodies (ANCA) are abnormal antibodies found in the blood in most people with Wegener's granulomatosis, a disease that affects the upper respiratory tract, lungs, and kidneys. They are uncommon in other diseases, which makes them useful in diagnosing this particular disease. ANCA levels are sometimes used to follow the course of Wegener's granulomatosis.

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 is the complement system in relation to rheumatoid arthritis?

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