Pain in the left hip that is exacerbated by leg movement.
Pelvis / hip x-rays
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The left superior femoral epiphysis is markedly flattened, sclerotic and appear to be undergoing fragmentation. Alignment is unremarkable and the pelvis and acetabulum appear normal.
The right hip appears normal.
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This case demonstrates characteristic advanced features of Perthes disease. One hopes to make the diagnosis before plain film changes are this pronounced, as in all likelihood this patient will require a hip replacement as a young adult for secondary osteoarthritis.