Bone (marrow) contusion (bone bruising or bone marrow oedema) is an osseous injury which may result from compression of bone structures.
Bone contusions represent microfractures with haemorrhage and can progress to osteochondritis dissecans 2. They typically appear within 48 hours of injury and can persist for up to six months 3.
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.
MRI is the modality of choice when investigating bone marrow. Bone (marrow) contusion can be seen as follows:
- T1: hypointense area of bone marrow that is affected
- T2: hyperintense area of bone marrow that is affected
- 1. Sanders TG, Medynski MA, Feller JF et-al. Bone contusion patterns of the knee at MR imaging: footprint of the mechanism of injury. Radiographics. 2000;20 Spec No (suppl 1): S135-51. Radiographics (full text) - Pubmed citation
- 2. Helms CA. Fundamentals of Skeletal Radiology: Expert Consult: Online (Fundamentals of Radiology). Saunders. ISBN:B00F0ZS62Y. Read it at Google Books - Find it at Amazon
- 3. Griffiths H. Musculoskeletal radiology. CRC Press. ISBN:0849393906. Read it at Google Books - Find it at Amazon