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Ankylosing Spondylitis (Sacroilitis)

Ankylosing Spondylitis (Sacroilitis)
Ankylosing Spondylitis (Sacroilitis)

This x-ray of the pelvis and sacral spine of a person suffering from ankylosing spondylitis shows fusion of both sacroiliac joints.

ST. BARTHOLOMEW'S HOSPITAL, LONDON/SCIENCE PHOTO LIBRARY