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What does an astronomically high SSD antibody mean?

I recently reviewed my labs over the last 4 years from my Rheumatologist. The 3 times my ANA 9 labs were run my SSA was normal but SSB levels were between 700-900!!! This has never been addressed. I am treated for Ankylosing Spondylitis, RA, Psoriatic Arthritis and was told I more than likely had Sjögrens. I have been reading for hours and can’t find what these types of levels could mean?!?
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15695260 tn?1549593113
Hello and welcome to the forum. Thanks for your question.  We do always hope that doctors will take the time to go over results with their patients as we know it is scary to get results and wonder what they mean.  The labs were over a 4 year period but no one ever contacted you to go through the information?  That's frustrating!  Was your ANA positive or negative? I am guessing positive with the AS, RA and pA diagnosis.  Lupus is hard to diagnose so they look at a combination of tests.  The SSB is always read with the SSA in combination to make a determination.  This article is fairly comprehensive regarding all tests they do under the sun for lupus.  https://www.webmd.com/lupus/laboratory-tests-used-diagnose-evaluate-sle#1  Here is information on sjogrens.  https://www.webmd.com/a-to-z-guides/sjogrens-syndrome#1  People with this condition often have other issues like dry mouth and eyes. Do you have that? GI issues can be present as well. This is a study that may provide some insight as well. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3702711/  About 23 percent of the study population was positive for SSB and diagnosed with Sjogrens.  Is there any way you can have a discussion with your doctor either over the phone or virtually?  I think that would be wise.  
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