Presentation
Bilateral pain, more marked on the right
Patient Data
Age: 65 years
Gender: Male
From the case:
Avascular necrosis of the hip - crescent sign appearance
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The study demonstrates advanced osteoarthritic change at the right femoral head which shows loss of normal sphericity; there are a loss of articular space and subchondral cyst.
Less marked osteoarthritis is present at the left hip.
The oblique projection (not real frog-leg projection) shows the presence of a linear area of subchondral lucency at the left femoral head in keeping with "crescent sign"
Case Discussion
Evidence of crescent sign in avascular necrosis of femoral head
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