2 doctors weighed in:
Can you still have rheumatoid arthritis with a negative rheumatoid factor test?
2 doctors weighed in

Dr. James Wolfe
Pain Management
1 doctor agrees
In brief: Yes
While the vast majority of patients with RA have a positive rf, a certain percentage do not.
Typically, the younger the patient, the better the chance the rf may be negative, depsite a clinical diagnosis of ra.

In brief: Yes
While the vast majority of patients with RA have a positive rf, a certain percentage do not.
Typically, the younger the patient, the better the chance the rf may be negative, depsite a clinical diagnosis of ra.
Dr. James Wolfe
Dr. James Wolfe
Thank
Dr. Thomas Namey
Internal Medicine - Rheumatology
In brief: Most, no! -possible
Most RA patients are rheumatoid factor positive (> 95%).
However, some rheumatoid factors are nit the IgM type detectable with standard assays. A more specific test is the ccp antibody. Rember, false positive rf tests are seen in up to %% of the population.

In brief: Most, no! -possible
Most RA patients are rheumatoid factor positive (> 95%).
However, some rheumatoid factors are nit the IgM type detectable with standard assays. A more specific test is the ccp antibody. Rember, false positive rf tests are seen in up to %% of the population.
Dr. Thomas Namey
Dr. Thomas Namey
Thank
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