accessory ossicle of the hand

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

A handy mnemonic is LOTTEO.

The full list 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):