How is adult-onset Still’s disease (AOSD) diagnosed?

How is adult-onset Still’s disease (AOSD) diagnosed?

No single test can identify AOSD. Because of this, tests might be done that exclude other diseases, especially infection and cancer. Doctors diagnose it after reviewing a person's medical history and symptoms, which include arthritis lasting at least 6 weeks.

Blood tests can rule out other conditions and diseases, and might even detect blood-cell level changes consistent with ASOD. Ferritin levels might be higher with ASOD than other similar diseases.

X-rays can spot damage to muscles and joints caused by the disease’s inflammation. Unfortunately, because the condition is rare, it can be undiagnosed or misdiagnosed.