Shenton's
line is formed from the continuity of the inferior aspect of the femoral neck
through to the inferior aspect of the superior pubic ramus. This gives a good
guide to the normal relationship of the head of the femur to the pelvis.
Synovial membrane is very extensive around the hip joint and, like the capsule,
comes well down the femoral neck, especially anteriorly. Note the normal
pattern of the bone trabeculae in the femoral neck, indicating the lines of
stress. Fractures of the femoral neck are common, especially in the old, and as
they may be impacted they are sometimes difficult to visualize. If severe
separation of the femoral head occurs, then the possibility of avascular
necrosis exists and it must therefore be checked on follow-up films.
