How is JIA diagnosed?
To make a diagnosis, a paediatric (young person's) rheumatologist will examine you and ask you questions. This will probably be done in a hospital.
There isn't a specific test for JIA, but your doctor will take blood tests and x-rays. They may also do other tests, including:
- ultrasound or MRI scans to try to see if there's arthritis and to rule out other conditions
- removing fluid from a joint (aspiration) to rule out joint infection
- bone marrow examination to rule out some rare conditions, especially if they think you have systemic-onset JIA.
You'll be diagnosed with JIA if:
- you've had arthritis for six weeks or more
- your symptoms started before your 16th birthday
- your doctor has ruled out other conditions that can cause arthritis.