Sacroiliitis

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Sacroiliitis
Classification and external resources
ICD-10 M46.1
ICD-9 720.2
MeSH D058566

In medicine, sacroiliitis is an inflammation of the sacroiliac joint. Sacroiliitis is a feature of spondylarthropathies (such as ankylosing spondylitis, psoriatic arthritis, reactive arthritis or arthritis related to inflammatory bowel diseases including ulcerative colitis or Crohn's disease). It is also the most common presentation of arthritis from Brucella.

Magnetic resonance images of sacroiliac joints. Shown are T1-weighted semi-coronal magnetic resonance images through the sacroiliac joints (a) before and (b) after intravenous contrast injection. Enhancement is seen at the right sacroiliac joint (arrow, left side of image), indicating active sacroiliitis. This patient had psoriatic arthritis.

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