Can I still have Psoriatic Arthritis despite having a negative rheumatoid factor?
my ESR is around 37, I am a fifty year old woman with psoriasis since I was 7 years old, and have rotten toenails because of it.
GP keeps telling me that my pains are due to osteo arthritis as my Rhem factor is negative, but I have had these pains since my 20s, and was diagnosed 7 years ago with fibromyalgia (which I still think was really psoriatic arthritis, but he ruled it out at the time, again because my factor was negative)
In the past I have had a GP and 2 ortho consultants suggest psoriatic arthritis, but rheum factor negative then as well.
I have heard though that this doesn't rule out psoriatic arthritis, though