Sacroiliitis (rare plural: sacroiliitides), an inflammation of the sacroiliac joint, can be a manifestation of a wide range of disease processes. The pattern of involvement is helpful for narrowing down the differential diagnosis.
Usually bilateral and symmetrical
Usually bilateral but asymmetrical
Usually unilateral
neoplastic destructive process
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infective
pyogenic septic arthritis
brucellosis 3,4
increase risk in intravenous drug use
Differential diagnosis
The following conditions can mimic a sacroiliitis
hyperparathyroidism: not a true sacroiliitis but can mimic appearances
mechanical stress
normal growing skeleton
See also
sacroiliitis (main article)
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grading of sacroiliitis
New York criteria (plain radiograph)