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immunology
Antinuclear Antibodies
ANA· also: Antinuclear Antibody
Clinical Overview
ANA is a screening test for autoimmune diseases. A positive ANA indicates the immune system is producing antibodies against the body's own cells. Found in Lupus (SLE), Sjögren's, and other autoimmune conditions.
Reference RangesWHO/IFCC standards
| Reference Range | Unit | Notes |
|---|---|---|
| < 1:1 | titer | Negative <1:40 titer; Positive ≥1:80 |
Also reported in: ratio.
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Related Topics
autoimmunelupusSLESjogren