Apple core sign (femur)

Last revised by Henry Knipe on 13 Oct 2022

The apple core sign has been used to describe the circumferential erosion of the femoral neck seen in synovial chondromatosis. Although this is the most common process that may lead to an apple core erosion of the femoral neck, this has also been observed with:

See also 

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Cases and figures

  • Figure 1: apple core
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  • Case 1
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