ankylosing spondylitis

Diseases

1.  Reiter's Disease

2.  Ankylosing Spondylitis

3.  Psoriatic Arthritis

4.  Enteropathic Arthritis

Clinical overlap between them

- typically young men with asymmetric lower limb oligoarthritis

- associated with HLA B27

Reiter's Disease

Definition

Reactive arthritis after veneral infection or dysentery

Definition

A HLA B27 positive, seronegative spondyloarthropathy with sacroiliac joint & spine involvement

Mainly affects the cartilaginous joints of the axial skeleton

Diagostic Criteria (1966 New York)

1. Positive X-ray Sacroiliitis