But that marker is not really indicative both ways (you can have it without the marker and be healthy with it) - find a good rheumatologist who usually sends you to a good radiologist and have some MRTs that identify it certain and quickly.
>you can have it without the marker and be healthy with it
That is literally true of every marker in existence. It's not the most specific marker, no, but if you already have a strong prior for presence of autoimmune disease, then the presence or absence of that HLA subtype can point towards most likely root cause (autoimmune diseases are all incredibly similar in the early stages).
