Accessory ossicles
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Accessory ossicles are secondary ossification centres that are separate from the adjacent bone. They are usually round or ovoid in shape, occur in typical locations and have well defined smooth cortical margins on all sides.
In most cases, they are congenital in origin, although they may occur as a result of trauma or local degenerative disease 2.
The significantsignificance of accessory ossicles is theretheir ability to mimic avulsion fractures.
- shoulder and elbow
-
wrist (mnemonic)
- os styloideum
- os hamuli proprium
- lunula
- os triangulare
- trapezium secondarium
- epilunate
- spine
- hip and knee
- foot (mnemonic)
-<p><strong>Accessory ossicles</strong> are secondary ossification centres that are separate from the adjacent bone. They are usually round or ovoid in shape, occur in typical locations and have well defined smooth cortical margins on all sides.</p><p>In most cases, they are congenital in origin, although they may occur as a result of trauma or local degenerative disease <sup>2</sup>.</p><p>The significant of accessory ossicles is there ability to mimic avulsion fractures.</p><ul>- +<p><strong>Accessory ossicles</strong> are secondary ossification centres that are separate from the adjacent bone. They are usually round or ovoid in shape, occur in typical locations and have well defined smooth cortical margins on all sides.</p><p>In most cases, they are congenital in origin, although they may occur as a result of trauma or local degenerative disease <sup>2</sup>.</p><p>The significance of accessory ossicles is their ability to mimic avulsion fractures.</p><ul>