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Os radiostyloideum

Last revised by Dr Mostafa El-Feky on 16 Sep 2020

Os radiostyloideum (or persistent radial styloid) is an accessory ossicle of the wrist located adjacent to the radial styloid process and lateral to the mid-portion of the scaphoid

This should not be confused with another bony ossicle in the wrist, os styloideum (part of a carpal boss), which is located between the bases of the 2nd and 3rd metacarpals. 

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Cases and figures

  • Figure 1: annotated image
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  • Case 1: x-ray
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  • Figure 2: annotated image
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  • Case 2: x-ray
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  • Case 3: CT
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