MRI of stress response typically shows intramedullary low T1 signal and corresponding increased T2, fat-saturated or STIR signal intensity, and may show enhancement of the corresponding marrow as well as surrounding soft tissues after contrast administration. An actual stress fracture will show the above findings associated with stress response, with the additional finding of a low T1, low T2 signal intensity line extending to the cortex representing the fracture plane [24,34-36].
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