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Femoral neck stress fracture (FNSF), with subsequent progression to a complete fracture of the right femoral neck.
The plain radiograph of the right hip (figure 3) demonstrates sclerosis on the medial aspect of the femoral neck (arrow).
A selective coronal image from the fat suppressed T2-weighted MRI sequence (figure 4) demonstrates an area of high T2 signal representing bone marrow oedema (arrow) on the medial aspect of the femoral neck. There is a horizontal linear area of low T2 signal within the region of bone marrow oedema, representing the stress fracture.
Stress fractures are classified based on the condition of the underlying bone; insufficiency fractures, when a fracture occurs as result of normal stress on abnormal bone; and stress fractures, which occur when there is excessive stress on a normal bone. Remodelling is the normal response of stress on a bone, and a stress fracture occurs as result of increased remodelling and microfracture in a bone. It has been reported that stress fractures may occur in up to 15% of athletes and …
Competing interests None.
Provenance and peer review Commissioned; externally peer reviewed.