If a person experiences joint pain and tests positive for an antinuclear antibody (ANA) test, this may suggest the presence of an underlying condition causing joint problems and discomfort. An ANA ...

Patients with juvenile idiopathic arthritis who demonstrate female sex, antinuclear antibody positivity and a positive family history have a higher risk for autoimmune thyroid disease, according to ...

A very small number of people who test negative for antinuclear antibody (ANA) in the blood, which is a sign of the most common type of lupus, still have the condition. Lupus is an autoimmune disease ...