Thank you for replies to an earlier post, very much appreciated 💗 So...been to see rheumatologist who has asked me to repeat ANA and anti DSDNA.
Results first ones were AnA..1/640 homogeneous
Ds Dsdna ab (Elia test) 16(high)
As the anti dsdna test was just positive or low positive he wanted me to repeat...
ANA came back the same and, anti dsdna came back (Elia) 41 (high)
I get all my test results via my hospital login.
However he has told me he had asked them (lab) to test my anti dsdna via crithidia test...and, said this came back negative...I didn't get this test result.
He said its more specific...when I asked him what was the point of the Elia he said different labs use different tests and he diagnoses using crithidia??
So he has said that my earlier diagnosis of psoriatic arthritis from 2013 is correct (even though I have no deformity to my joints after 10 years of only anti inflammatory meds) and because I have had reactions to other dmrds he has started me.on hydrocloxquine (not spelt correctly) which is for lupus and only prescribed off label for psoriatic arthritis?
I left the consultation very confused.
Psoriatic arthritis doesn't normally have a homogeneous ana pattern normally speckled or nucleus and, very rarely antibodies are found (in any test) for dsdna. When I was diagnosed 10 years back these were all weakly positive. Which at the time would make sense for seronegative arthritis such as psoriatic arthritis, but it's just not progressed as expected (a good thing).
I'm also confused as to how a test that is 95% positive (Elia) is not specific and how crithidia test would show a negative if I was positive twice with an Elia test.
My worry is that the Elia phadia test is new..used since Feb this year in my nhs and my consultant is in refusal to recognise it....why would he ask for an alternative?
I am happy about the treatment because if it is lupus this should help but if its not helpful for psoriatic arthritis biologics is my next step and they differ completely ...so, I would want to feel confident in diagnosis really before taking these medicines.
Any opinions and advice would be appreciated..sorry for the long post...thank you all in advance !