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RA Factor

About the test
What is this test done for?
Rheumatoid factor is an autoantibody which was first found in rheumatoid arthritis. A Rheumatoid factor test measures the amount of the rheumatoid factor in the blood
Why is it Done?
The test is done if there is a suspicion of an autoimmune disease like rheumatoid arthritis or Sjogren’s syndrome, etc. and a positive family history.
When should it be performed?

The following symptoms and conditions lead to the need of ordering the RA factor test:

  • Chronic infection
  • Joint stiffness
  • Increased joint pain in the morning
  • Loss of cartilage or bone loss
  • Swelling in the joints
  • Dry mouth, dry eyes
  • Extreme fatigue.
How is it done
A blood sample will be collected from a vein in your arm. Fasting is not necessary prior to sample collection.
Results
  • Positive detection of RA factor means there is autoimmune disease presence, particularly Rheumatoid Arthritis. Certain other diseases also show high levels of RA factor like cancer, chronic infections, sarcoidosis, Sjogren’s syndrome and systemic lupus erythematous.
  • Negative results mean— no autoimmune conditions.
Other Tests
X-rays of specific joints, MRI might be required to confirm rheumatoid arthritis.
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