About our e-newsletters
- Free e-newsletters
- Mayo Clinic expertise
- We do not share your e-mail address
Housecall, our weekly general-interest e-newsletter, keeps you up to date on a wide variety of health topics with timely, reliable, practical information, recipes, blogs, questions and answers with Mayo Clinic experts and more. Our biweekly topic-specific e-newsletters also include blogs, questions and answers with Mayo Clinic experts, and other useful information that will help you manage your health.
Housecall Archives
Mayo Clinic Housecall
Stay up to date on the latest health information.
What you get
- Free weekly e-newsletter
- Mayo Clinic expertise
- Recipes, tools and other helpful information
- We do not share your e-mail address
Results
By Mayo Clinic staffA positive rheumatoid factor test result indicates that a high level of rheumatoid factor was detected in your blood. A higher level of rheumatoid factor in your blood is closely associated with autoimmune disease, particularly rheumatoid arthritis. But a number of other diseases and conditions can raise rheumatoid factor levels, including:
- Cancer
- Chronic infections
- Cirrhosis
- Cryoglobulinemia
- Inflammatory lung diseases, such as sarcoidosis
- Mixed connective tissue disease
- Scleroderma
- Sjogren's syndrome
- Systemic lupus erythematosus
Some healthy people have positive rheumatoid factor tests, though it's not clear why. And some people who have rheumatoid arthritis will have low levels of rheumatoid factor in their blood.
- Goodyear CS, et al. Rheumatoid factors and other autoantibodies in rheumatoid arthritis. In: Firestein GS, et al. Kelley's Textbook of Rheumatology. 8th ed. Philadelphia, Pa.: W.B. Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/215187023-6/1040817228/1807/359.html#4-u1.0-B978-1-4160-3285-4..10051-8--s0010_1498. Accessed Aug. 18, 2010.
- Rheumatoid factor. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/rheumatoid/multiprint.html. Accessed Aug. 19, 2010.
- Shmerling RH. Origin and utility of measurement of rheumatoid factors. http://www.uptodate.com/home/index.html. Accessed Aug. 19, 2010.
Find Mayo Clinic on