Antinuclear Antibody (ANA) Test
Health Checkups
estimated about CNY 200-500
(estimated about USD 30-70)
1 day
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Description
The ANA test helps diagnose autoimmune conditions like lupus or rheumatoid arthritis when patients have unexplained rashes, joint pain, or fatigue; costs ¥200–500 in China, with ChinaMedicalHub assisting hospital booking and interpreter support.
Main Uses
The primary purpose of the ANA test is to help diagnose autoimmune diseases, especially systemic lupus erythematosus (SLE). It is also used to monitor the effectiveness of treatment and to assess the progression of the disease. The test is applicable when patients present with signs and symptoms suggestive of an autoimmune disorder, such as joint pain, fatigue, and skin rashes.
Normal Range
A negative or low titer (usually <1:40) is considered normal. A positive ANA test with a titer of 1:80 or higher may indicate an autoimmune disorder, but the specific pattern and titer level are also important for interpretation.
Low Values - Possible Causes
Low values or negative results typically do not have specific causes as they are expected in healthy individuals. However, if expecting a positive result due to symptoms, it could be due to early stage of disease, testing too soon after symptom onset, or the presence of an autoimmune condition that does not produce ANAs.
High Values - Possible Causes
High values can be caused by Systemic Lupus Erythematosus (SLE), Sjögren's syndrome, Rheumatoid Arthritis, Mixed Connective Tissue Disease, and other autoimmune disorders. It can also be seen in some non-autoimmune conditions like infections, malignancies, and in elderly people without any apparent disease.
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