Accessory ossicles of the wrist

Last revised by Payam Riahi on 9 Sep 2022

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):

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