What is the role of radiography in the diagnosis and ongoing evaluation of ankylosing spondylitis (AS) and undifferentiated spondyloarthropathy (USpA)?

Updated: Sep 03, 2019
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

Radiographic evidence of inflammatory changes both in the sacroiliac (SI) joints and in the spine are useful in the diagnosis and ongoing evaluation of the disease process. [8] This disease generally begins in the distal portions of the spine and progresses more proximally with time in a continuous fashion.


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