A member asked:

My rheumo has been treating my oa and fibro and tested me every 3 months for rf and it finally came back positive this time. why does that happen?

A doctor has provided 1 answer

See below: I am not sure why they were checking it every 3 months, unless they were checking through different lab and he or she suspected that you had it, but some patients who have seronegative RA do convert to positive status overtime.

Answered 6/10/2014

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