I have a very high ANA titre (1:2560 homogenous), but normal immunoglobulins (IgG, IgA, and IgM) and normal CRP. Could I still have lupus?

False positive. Repeat the test. Other meds and conditions may cause this if the result is real and repeatable. If real and no other explanation, you need follow up by your doc as you may have an autoimmune disease that is too early to diagnose. Best wishes!

Related Questions

Igg was 1570 norm 717-1411, igm, IgA normal- sed rate, CRP norm. Cbc norm. Cmp norm cept co2 was 22 norm is 23-32. Ana was 1:160speckled, hands feet tingly at times. No raynaud why hi IgG and low co2?

Lab data. These data can only be interpreted in the context of clinical issues. You need to go back and ask the doctor who ordered these tests what they mean. Without knowing why they were ordered the results are meaningless. By the way, they are so close to normal that would not worry about it. Read more...
You need a......? Reflex ana, or an ANA profile. I would also add an ace assay. Sle and other collagen vascular disease usally have a normal crp. You have not explained you take plaquenil, (hydroxychloroquine) and why you are on it is important. Having ANA positivity alone is not justification for this drug. You may or may not have an autoimmune disease, but you have not had the tests done, or did not provide the information! Read more...