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Moderate bilateral joint effusions have developed since the previous MRI. Crescentic T2 high signal is seen in both femoral heads, extending more than 50% of the articular surface. This was subtly present on the previous MRI, but is now much larger, and is keeping with a subchondral fracture. No collapse of the femoral head at this stage.
The marrow signal change within the femoral head/neck bilaterally, as well as the posterior acetabulum, is otherwise unchanged. No fracture through the femoral necks identified.
Chronic bilateral hip avascular necrosis with apparently extended subchondral fracture lines involving >50% of the femoral heads. Bilateral effusions have worsened.