Accessory ossicles of the wrist

Dr Craig Hacking and Dr Henry Knipe et al.

Accessory ossicles of the wrist are commonly seen on plain radiographs of the wrist and associated cross-sectional imaging. Over 20 were originally described 2, although the more common include 1:

A handy mnemonic is LOTTEO.

The full list 2 can be broadly split into three groups: those around the carpometacarpal joints, those around the scaphoid and those around the lunate.

The distal row, from ulnar margin to radial margin are:

The ossicles that surround the scaphoid (starting at the radioscaphoid joint and working anti-clockwise):

The ossicles that surround the lunate (starting at the scapholunate joint and working anti-clockwise):

Upper limb anatomy
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Article information

rID: 23575
Section: Anatomy
Synonyms or Alternate Spellings:
  • Accessory ossicle of the wrist

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Cases and figures

  • Drag
    Fig 1: all the ossicles
    Drag here to reorder.
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    Distal row of oss...
    Fig 2: ossicles around the carpometacarpal joint
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    The ossicles arou...
    Fig 3: ossicles around the scaphoid
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    The ossicles arou...
    Fig 4: ossicles of the wrist and hand
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