Definition
A crescent-shaped line visible on X-ray or MRI in avascular necrosis, indicating that the bone just beneath the joint surface has begun to collapse. It marks the transition to a more advanced stage of the disease.
Crescent Sign
diagnosticThe crescent sign is a thin, crescent-shaped line seen on an X-ray or MRI in avascular necrosis. It shows that the bone just beneath the joint surface has started to collapse. Its appearance marks a move to a more advanced stage of the disease, which matters when doctors stage the condition and plan treatment. It is most often looked for at the hip.
Curious about Crescent Sign?
Talk to an AVN physician to understand how this relates to your condition and treatment plan.