Understanding Lab Tests for Psoriasis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Psoriasis is a chronic autoimmune skin condition that causes red, scaly patches on the skin. While psoriasis is primarily diagnosed through clinical examination of the skin, blood tests play a valuable supporting role in understanding the underlying immune mechanisms and genetic predisposition associated with this condition.
Top Recommended Test
Interleukin 17, Serum
This test measures levels of Interleukin 17, a key inflammatory protein involved in psoriasis development. Elevated IL-17 levels are commonly observed in psoriasis patients and play a critical role in the autoimmune processes that cause the characteristic skin inflammation and abnormal cell growth seen in this condition.
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The Role of Blood Testing in Psoriasis
Although there is no single blood test to diagnose psoriasis itself, laboratory testing is fundamental for assessing immune system activity, identifying genetic risk factors, and monitoring the body's inflammatory response. These tests provide valuable insights that can help guide treatment decisions and improve understanding of disease progression.
Other Relevant Tests
HLA-A, B, C, DRB1 and DQ High Resolution
This comprehensive genetic test analyzes HLA (Human Leukocyte Antigen) markers, particularly HLA-Cw6, which has been strongly linked to early-onset psoriasis. Understanding genetic predisposition can provide valuable information about disease risk, potential severity, and treatment response patterns.
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Understanding Your Results
These blood tests provide complementary information to clinical diagnosis. Elevated inflammatory markers may indicate active disease processes, while genetic testing can reveal inherited risk factors that contribute to psoriasis development. Results should always be interpreted in conjunction with clinical symptoms and physical examination findings.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
