Ankylosing spondylitis (AS) inflames spinal joints and ligaments, causing back pain and stiffness. Over time, bones can calcify and fuse, limiting movement and posture. AS can affect multiple body ...

Ankylosing spondylitis is a type of arthritis that primarily affects your spine and hips. It can be difficult to diagnose because there’s no single test that can provide enough information for a ...

Heel pain and tenderness is a common symptom in people with ankylosing spondylitis. This is because inflammation can affect tendons and ligaments in the heel area. Ankylosing spondylitis is a type of ...

Panels A through G show images for a 26-year-old man with a 2-year history of inflammatory back pain that was unresponsive to nonsteroidal antiinflammatory drugs. A posteroanterior pelvic radiograph ...