Bone Marrow Edema of the Knee As MRIs become more commonplace, providers are finding more bone marrow edema.
Bone Marrow Edema of the Knee As MRIs become more commonplace, providers are finding more bone marrow edema. On a T2 weighted fat suppression MRI image, bone marrow edema will appear bright in contrast to a normally appearing dark/low fluid intensity appearing bone (1,2). T2 Image of Bone Marrow Edema Formal naming of bone marrow edema can be confusing.
Bone marrow edema has taken on multiple names and some of the more common are transient osteoporosis, spontaneous osteonecrosis, and subchondral insufficiency fracture. Nomenclature of Bone Marrow Edema Radiologists have tried to classify bone marrow edema syndrome as primary or secondary. A primary source involves the large weight bearing joints and the cause is usually unknown.
A secondary source is caused by acute or chronic repetitive stresses. Bone marrow edema has been found more commonly in older patients. This can create confusion as to the etiology of the edema because older patients have higher rates of osteoarthritis, which can be associated with edema.
Research has shown that articular cartilage degeneration is associated with the development of bone marrow edema. Bone marrow edema typically occurs in the areas where the articular cartilage is damaged. There are multiple hypotheses regarding the etiology of bone marrow edema.
The cause of the marrow edema can be the result of ischemic changes in the bone marrow and reactive changes to mechanical stress. Much attention to the etiology of the bone marrow edema has been given to the subchondral bone. Histologic samples of bone marrow edema show fibrotic changes, necrosis, and poor mineralization within the subchondral bone.
If you are experiencing symptoms that may be related to bone marrow edema in the knee, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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