I have to chime back in on the lupus labs. I am extremely familiar with them, as I've lived with Lupus for the last 4 years. I want to be sure we give accurate info about the screening process to anyone who may be going through it or may go through it in the future.
I have a pet peeve, and that is doctors who check Lupus labs (or especially just an ANA one time) and tell people they are fine. If lupus (or any other autoimmune illness is truly suspected, based on symptoms, that person should have serial labs done, over a long period of time, before it can really be ruled out or ruled in. It takes, on average, 1 year or longer for someone with systemic lupus to be diagnosed.
The ANA can be positive with other illnesses besides Lupus, it can occasionally be positive in perfectly healthy people, it can fluctuate to the point that it shows negative on numerous lab tests, and although rare, there is an ANA Negative Lupus.
There are numerous Lupus antibodies, and each one has it's own blood test. Lupus simply can not be ruled out (or diagnosed) based on an ANA result.
When I first had symptoms, and went to a Rheumatologist, based on symptoms alone, he said that I had "something autoimmune", but we wouldn't know what it was without my lab work giving him additional clues. I saw him every single month, and every single month, he did a full panel of lab work (for Lyme Disease, Rheumatoid arthritis, Lupus, Sjogren's, etc...). Every single month for 8 months, my labs were completely normal. The 9th consecutive month of labs finally showed positive for Lupus. Since then, my lupus labs have bounced around. They go up, down, appear and disappear. (I am very active in the Lupus community, and I can tell you that this is not at all unusual, and seems to be the "norm", more often than not).
I have a link for some good information below, in case anyone is interested. If you are being screened for Lupus (or other AI disorders), or have been screened recently, I suggest you familiarize yourself with the screening process, so that you can ensure that your doctor is doing all they can to rule out AI disorders. **PLEASE NOTE: If you read it, please keep in mind: when it explains the ANA and states that 97 or 98% of people with Lupus will have a positive ANA, that may be true. HOWEVER, it does not mean that the ANA is constantly positive. Remember, mine was negative for the first 8 months of screening, and that is not at all uncommon.
The point I really want to make is this: if you or your doctor has a reason to suspect lupus and screen for it, don't accept it being ruled out based on one negative blood test, drawn one time. You can indeed argue with autoimmune blood tests. They are sneaky and they don't always tell the truth.
Sharon