they look for fused SI joints by xray and give you a blood test for the gene HlaB27 sometimes people ahve it and sometimes people dont have it. also he will ask you about pain and if anyone else has it in your family and. i ahve it or a similar type of condition as my end plate vertrebre all ahve a lip like bone formation taht goes from one end plate vertrebre to the next one down and so forth, it somes on differently for women than it does for men. women tend to get it in ther neck first and lumbar later, i have it in my thoriacic and neck area and dont ahve it in the lumbar section yet.
you can get this from trama, ops, and inherited, sometimes diets help to cut out starches and refined sugar. for me nothing seems to help it
Here are two great websites for info on the spondyloarthropathies: (Ankylosing spondylitis being one of them)
Spondyloarthropathies: Using presentation to make the diagnosis
Spondylitis Association of America; click on the "about Spondylitis" link at the upper left hand section.
Hope you find what you're looking for.
Okie dokie, I found a couple of other sites that have good info. These two tests are used for diagnosis: Gaenslen test, Schober test.
Sorry, I don't have time (very busy morning) to go into detail about them, but you can look at these websites yourself.
Are you seeing a rheumatologist? AS can be very difficult and tricky to diagnose. I don't have that diagnosis myself, but it's likely I have some type of spondyloarthropathy (I'm HLA-B27 positive with a history of iritis, and my IBD diagnosis is currently under scrutiny, long story.) My rheumy believes I have simply seronegative rheumatoid arthritis, (I don't believe that) but I'm very lucky to be on Enbrel, which has helped me 98%, so I'm not going to argue with him.
The following message board is excellent, and it seems that the struggle to find a knowledgeable rheumatologist and to get a diagnosis for AS is similar to that in finding a good GI doc and getting a proper IBD diagnosis.
http://bbs.spondylitis.org/cgi-bin/ultimatebb.cgi (see General Message Board for...)
I have a question about AS. Is it always seronegative? I have long suspected that AS is similar to what the heck is wrong with me. Rheumy believes I have undiagnosed IBD which is currently being controlled by enbrel. HOwever, I have a positive RF, which messes everything up. My official dx is RA, but I've never had the joint swelling and deformities associated with RA.