Bone contusion
Bone (marrow) contusion (also known as bone bruising) is an osseous injury which may result from compression of bone structures.
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Pathology
Bone contusions represent trabecular microfractures with hemorrhage and without a discrete fracture line or contour abnormality 4. They typically appear within 48 hours of injury and can persist for up to six months 3.
Etiology
Most bone contusions are a result of a direct blow to the bone, traction from avulsion trauma or compression of adjacent bones 1,2. Depending on where bone contusion is seen, the underlying trauma mechanism can be identified. Each trauma mechanism has its own pattern of bone contusion.
Complications
They can progress to osteochondritis dissecans 2.
Radiographic features
MRI
MRI is the modality of choice when investigating bone marrow. Bone (marrow) contusion is typically ill-defined with the following signal characteristics 4:
- T1: hypointense area of bone marrow that is affected
- T2: hyperintense area of bone marrow that is affected
See also
Related Radiopaedia articles
Fractures
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fracture
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facial fractures
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spinal fractures
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cervical spine fracture classification systems
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cervical spine fracture classification systems
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