Ankylosing Spondylitis

What is Ankylosing Spondylitis and Spondyloarthropathies?

Ankylosing spondylitis is a type of arthritis that, as a member of the spondyloarthropathies family, affects the spine and the ends of the tendons and ligaments. It causes lower back pain that can eventually lead to a permanent curvature of the spine.

Spondyloarthropathies also include Reiter’s syndrome, psoriatic arthritis, and enteropathic arthritis (ulcerative colititis and Chrohns disease).

Who does it affect?

Ankylosing spondylitis is two and half times more common in males than females and starts to affect patients between the ages 20 and 40. Males are also more affected by chronic back pain than female patients.

Frequency of cases of spondyloarthropathies
Disease: No. of cases per 100,000 people
Ankylosing spondylitis 150
Psoriatic arthritis 60
Reactive arthritis and Reiter’s syndrome 15
Ulcerative colitis (enteroarthropathy) 75
Crohns disease (enteroarthropathy) 50