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Subchondral bone marrow edema is also commonly seen in patients with degenerative joint disease (10 â 14). Subchondral bone marrow edema in patients with osteoarthritis of the knee joint has been associated with knee pain and the progression of articular cartilage degeneration (12, 13).
Bone marrow has three components: the bony portion, a fatty portion, and a portion that makes blood cells. The composition of bone marrow changes to have less blood formation with age. There is more fatty marrow. The last area of bone to change is near the ends of bone and in the spine. In marathon runners, high altitude residents, and menstruating women, islands of blood forming marrow can be seen on MRI, according to the American Roentgen Ray Society. Bone marrow edema or bone bruises are areas of increased fluid. This can occur from small fractures of the bone, blood, or increased fluid. Bone edema on MRI helps to diagnose several conditions.