Are there tests for psoriatic arthritis?

[jiml]

An ultrasound with the proper equipment and proper staff is one of better choices for arthritis. I say this in caution - roughly 15% that properly trained by experts fail at ultrasound. There are two blood test CRP and ESR. CRP test short term inflammation, while ESR is long term inflammation. All three together is good as gets for a diagnosis.

Thanks Matari that's useful information, but now I will have to wait to see what the rheumatologist makes of the pictures,  what does ESR and CRP mean