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  • Age: 41
  • Sex: female
  • Medical history:
    • Chronic back pain, progressive for 3 months.
    • The pain persists at rest, slight improvement upon movement. The pain also occurs at night, in the early morning hours.
    • No radiation of the back pain.
    • No morning stiffness.
    • CRP and ESR normal. 
    • HLA-B27 negative.
    • No children.
    • Known spondylolosthesis L5 and status post disc protrusion L4/5.
    • No radiographs were taken due to the intention to have a baby.

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Case 1: Back pain for 4 months
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Osteitis condensans

This is the typical pattern of osteitis condensans. In the ventral slices, there is shallow bone marrow edema found in the STIR sequence (slices 6-9 right and 6-8 left). Sclerosis, which is also typical for the disease, is found here only to a very small extent. Erosions are not present.

Unfortunately, osteitis condensans is often described in radiological reports as sacroiliitis and attributed to axial spondyloarthritis.