Editing Sjögren's disease (section)

====Blood tests====
[[File:Main antinuclear antibody patterns on immunofluorescence.png|thumb|Main [[antinuclear antibody]] patterns on [[immunofluorescence]].<ref>{{cite journal| author=Al-Mughales JA| title=Anti-Nuclear Antibodies Patterns in Patients With Systemic Lupus Erythematosus and Their Correlation With Other Diagnostic Immunological Parameters. | journal=Front Immunol | year= 2022 | volume= 13 | issue=  | pages= 850759 | pmid=35359932 | doi=10.3389/fimmu.2022.850759 | pmc=8964090 | doi-access=free }}<br />Minor edits by
Mikael Häggström, MD<br />- Attribution 4.0 International (CC BY 4.0) license</ref> Individuals with Sjögren syndrome usually have a speckled or homogeneous pattern, and rarely a centromere pattern.<ref>{{cite web|url=https://www.hopkinssjogrens.org/disease-information/diagnosis-sjogrens-syndrome/blood-and-urine-tests/|title=Blood and Urine Tests|website=[[Johns Hopkins School of Medicine]]|access-date=2023-05-28}}</ref>]]
Blood tests can be done to determine if a patient has high levels of antibodies that are indicative of the condition, such as [[antinuclear antibody]] (ANA) and [[rheumatoid factor]] (because Sjögren's disease frequently occurs secondary to rheumatoid arthritis), which are associated with autoimmune diseases. Typical SS ANA patterns are [[Anti-SSA/Ro autoantibodies|SSA/Ro]] and [[Anti-nuclear antibody#Anti-Ro/SS-A and anti-La/SS-B|SSB/La]], of which anti-SSB/La is far more specific; anti-SSA/Ro is associated with numerous other autoimmune conditions, but is often present in SS. However anti-SSA and anti-SSB tests are frequently not positive in SS.{{citation needed|date=October 2020}}