Knochenkontusion
Bone bruises (also known as bone contusion, trabecular microfracture) are an osseous injury that results from compression of bone structures.
Pathology
Bone bruises represent trabecular microfractures with hemorrhage and without a discrete fracture line or contour abnormality . They typically appear within 48 hours of injury and can persist for up to six months .
Etiology
Most bone contusions are a result of a direct blow to the bone, traction from avulsion trauma, or load to a subchondral surface . Depending on where bone contusion is seen, the underlying trauma mechanism can be identified.
Complications
They can progress to osteochondritis dissecans .
Radiographic features
Plain radiograph
Plain radiography will not demonstrate cancellous features but can show regions of impaction, for example, a Hill-Sachs lesion .
MRI
MRI is the modality of choice when investigating bone marrow. Bone (marrow) contusion is typically focal and ill-defined with the following signal characteristics :
- T1: focal hypointense area of bone marrow
- T2 fat-saturated: focal hyperintense area of bone marrow
See also
Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Knochenkontusion: