A member asked:

Can psoriatic arthritis have a positive rf factor? was diagnosed with seropositive ra. take methotrexate 1cc weekly and humira biweekly. have developed psoriasis on both elbows. blood work only showed rf +,elevated crp, high sed rate.could it be psa?

2 doctors weighed in across 2 answers

There are false positive RF in significant amounts. Yours could be a false positive or you could have both psoriasis and rheumatoid arthritis. PSA can elevate sed rate & CRP. Are your fingernails pitted? If you're female, I favor RA& psoriasis. If male, PSA. . However A rheumatologist is best to advise you.

Answered 5/4/2022

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It could. Best to see a Rheumatologist or an MD experienced in arthritis.

Answered 5/30/2022

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