Accessory ossicles

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Accessory ossicles are secondary ossification centres that remain 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 significance of accessory ossicles is their potential to mimic avulsion fractures.

shoulder
- os acromiale
elbow
- os supratrochleare dorsale
wrist (~~~~mnemonic~~)~~
- os styloideum
- os hamuli proprium
- lunula
- os triangulare
- trapezium secondarium
- epilunate
spine
- accessory ossicle of the anterior arch of the atlas
- Oppenheimer ossicle
- os odontoideum
- persistent ossiculum terminale - Bergmann ossicle
- nuchal ligament sesamoid ossicle
hip
- os acetabuli
knee
foot (~~~~mnemonic~~)~~

~~-<a href="/articles/accessory-ossicles-of-the-wrist">wrist</a> (<a href="/articles/accessory-ossicles-of-the-wrist-mnemonic">mnemonic</a>)<ul>~~
+<a href="/articles/accessory-ossicles-of-the-wrist">wrist</a><ul>
~~-<a href="/articles/accessory-ossicles-of-the-foot">foot</a> (<a href="/articles/accessory-ossicles-of-the-foot">mnemonic</a>)<ul>~~
+<a href="/articles/accessory-ossicles-of-the-foot">foot</a><ul>

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Accessory ossicles

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