What Blood Test Shows Psoriatic Arthritis?

Are you wondering about the specific blood tests used to diagnose psoriatic arthritis (PsA)? Look no further! In this article, we will explore the blood tests commonly employed in diagnosing PsA. But before we dive in, let’s start with a quick questionnaire to gauge your knowledge on this topic. Are you ready? Let’s get started!

Understanding the Blood Tests

Now that you’ve taken the questionnaire, let’s delve into the blood tests that are commonly used to detect signs of psoriatic arthritis:

1. Rheumatoid Factor (RF) Test

While rheumatoid factor is typically associated with rheumatoid arthritis, it may also be present in some cases of psoriatic arthritis. However, the presence of RF does not definitively diagnose PsA.

2. Anti-Cyclic Citrullinated Peptide (anti-CCP) Antibody Test

This blood test helps in the diagnosis of rheumatoid arthritis, but it can also be used as an additional marker for PsA. A positive result suggests an increased likelihood of PsA, but it is not exclusive to this condition.

3. C-Reactive Protein (CRP) Test

The CRP test measures the level of inflammation in the body. Elevated CRP levels can indicate the presence of inflammation, which is common in psoriatic arthritis.

4. Erythrocyte Sedimentation Rate (ESR) Test

The ESR test measures the rate at which red blood cells settle in a tube. Higher ESR levels indicate the presence of inflammation, which can be associated with PsA.

5. HLA-B27 Test

This genetic test identifies the presence of the HLA-B27 gene. While it is not specific to PsA, its presence may increase the likelihood of developing certain forms of arthritis, including PsA.

Consult a Healthcare Professional

It’s important to remember that while these blood tests can provide valuable information, they are not definitive diagnostic tools for psoriatic arthritis. A comprehensive evaluation by a healthcare professional, including a review of medical history, physical examination, and imaging studies, is essential for an accurate diagnosis.


Congratulations on completing the article! We hope the questionnaire and information provided have helped you better understand the blood tests used in diagnosing psoriatic arthritis. Remember, if you have concerns about your health, it’s always best to consult a healthcare professional who can provide personalized guidance and support.