Os radiostyloideum

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. 

Upper limb anatomy
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Article information

rID: 25067
Section: Anatomy
Synonyms or Alternate Spellings:
  • Persistent radial styloid

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Cases and figures

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    Persistent radial...
    Figure 1: os radiostyloideum (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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