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Skeletal Radiology

, Volume 8, Issue 4, pp 251–258 | Cite as

CT analysis of the upper end of the femur: The asterisk sign and ischaemic bone necrosis of the femoral head

  • W. Dihlmann
Articles

Abstract

In computed tomography (CT) of the head of the femur, a star-shaped structure can be seen which we refer to as theasterisk orasterisk sign. The asterisk is formed by thickened weight-bearing bone trabeculae. It can be shown by CT that the asterisk exhibits a characteristic change in ischaemic bone necrosis of the femoral head, even when the disease is in an early stage. CT of the hip joint is therefore an important examination for early diagnosis of ischaemic disease of the femoral head.

Key words

Asterisk sign Ischaemic necrosis of the femoral head Early diagnosis by computed tomography 

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Copyright information

© International Skeletal Society 1982

Authors and Affiliations

  • W. Dihlmann
    • 1
  1. 1.A.K. BarmbekInstitute of RoentgenologyHamburg 60Federal Republic of Germany

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