Osteitis is an inflammation of the bone, usually in the context of inflammatory arthropathy.
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Terminology
Osteitis refers only to the inflammation of bony structures, in particular the cortex (non-medullary infection or infectious osteitis) 1-3. If there is infectious involvement of the medullary cavity, this is referred to as osteomyelitis 3.
Radiographic appearance
Radiographs
- regional osteopenia
- focal bony lysis or cortical loss
MRI
-
T1
- intermediate to low signal of cortical bone
- normal signal of adjacent bone marrow
-
T2
- intermediate to high signal of cortical bone
- normal or high signal of adjacent bone marrow
-
T1 C+
- post-contrast enhancement of cortical bone
- no post-contrast enhancement of adjacent bone marrow
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