Ankylosing spondylitis (AS) is a chronic, inflammatory form of arthritis that mainly affects the spine. While the exact cause of AS is unknown, it is thought to involve a combination of genetic and environmental factors. AS is a lifelong condition, but with proper treatment, one can lead a normal life.
Diagnosing AS can be challenging, as its symptoms may mimic other conditions and may take many years to fully develop. To confirm a diagnosis of AS, a doctor may perform a physical exam, take a medical history, and order tests such as X-rays, MRI scans, and blood tests.
Physical Exam
During a physical exam, the doctor will check for signs of inflammation, stiffness, and pain in the spine and other joints. They may also look for other physical signs of AS, such as an enlarged tendon in the heel, or a stiff, straight posture.
Medical History
A doctor will also ask questions about the patient's medical history, including any family history of AS and any other illnesses or conditions. They will also ask about the patient's lifestyle and current symptoms.
X-rays and MRI Scans
X-rays and MRI scans can help a doctor diagnose AS. X-rays can show changes in bone structure that may indicate AS, such as fusion of the spine. MRI scans can reveal inflammation and damage to the spine, as well as any changes in the surrounding soft tissues.
Blood Tests
Blood tests can look for markers of inflammation, such as the presence of certain antibodies. These can help confirm a diagnosis of AS.
In some cases, a doctor may also refer a patient to a rheumatologist for further evaluation and treatment. The rheumatologist may recommend other tests, such as a CT scan or ultrasound, to further confirm a diagnosis of AS.
A diagnosis of AS can be difficult to make. However, with the right tests and evaluation, a doctor can confirm a diagnosis of AS and provide effective treatments to manage the symptoms and improve quality of life.