While no single test confirms lupus, doctors diagnose it based on a combination of factors including symptoms, physical exam findings, and results from various blood and urine tests.
Here's a breakdown of tests often used in the diagnosis of lupus:
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Complete Blood Count (CBC): This test checks for low counts of red blood cells (anemia), white blood cells (leukopenia), and platelets (thrombocytopenia). These abnormalities can be associated with lupus.
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Complement Tests: These measure the levels of complement proteins in the blood. Complement proteins are part of the immune system and help destroy foreign substances. Low levels of complement (e.g., C3, C4, CH50) can indicate that the immune system is actively consuming these proteins, which can occur in lupus.
Ultimately, a diagnosis of lupus requires a comprehensive evaluation by a qualified healthcare professional who can interpret these test results in the context of your specific symptoms and medical history. There is no single, definitive "lupus test" that provides a yes/no answer.
