Psoriatic arthritis (PsA) is a complex autoimmune condition that affects the joints and skin, often requiring long-term management and careful monitoring. A range of tests is used to diagnose PsA, monitor disease progression, and assess treatment effectiveness. Understanding these tests can empower you to take an active role in your healthcare.
1. X-Ray Imaging
X-rays are a common imaging test used to detect changes in the bones and joints associated with PsA. These changes include bone erosion, new bone formation, and bone fusion, all of which can indicate disease progression.
How often should you be tested?
X-rays are typically performed at the time of diagnosis and may be repeated annually to monitor changes over time or as needed to monitor disease progression.
2. MRI Imaging
Magnetic resonance imaging (MRI) provides detailed images of the joints, allowing healthcare providers to assess inflammation and joint damage. MRIs are often used when X-rays do not provide enough information or to monitor disease activity and progression.
How often should you be tested?
Initially used for diagnosis, MRIs may be repeated periodically to assess disease activity and joint damage.
3. Erythrocyte Sedimentation Rate (ESR)
The ESR is a blood test that measures the rate at which red blood cells settle in a test tube over a specific period. An elevated ESR can indicate the presence of inflammation in the body, which is common in PsA.
How often should you be tested?
This test is typically done at the time of diagnosis and may be repeated several times a year to monitor inflammation.
RELATED: Psoriatic Arthritis: Types, Causes, Symptoms & Treatments
4. C-Reactive Protein (CRP)
Like the ESR, CRP is a blood test that measures inflammation in the body. High levels of CRP can indicate active inflammation, which is often seen in PsA. This test is also used to monitor disease activity over time.
How often should you be tested?
This test is done at diagnosis and may be repeated several times a year to assess how your inflammation is responding to treatment.
5. Rheumatoid Factor (RF)
While rheumatoid factor is more commonly associated with rheumatoid arthritis, it can also be present in a small percentage of people with PsA.
How often should you be tested?
This test is usually done at the time of diagnosis to help differentiate between the two conditions and is not usually repeated unless
