Accessory ossicles

Changed by Yahya Baba, 27 May 2022
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Disclosures - updated 6 Apr 2022: Nothing to disclose

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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.

  • -<li>shoulder<ul><li><a href="/articles/os-acromiale">os acromiale</a></li></ul>
  • +<li>
  • +<a title="accessory ossicles of the shoulder" href="/articles/accessory-ossicles-of-the-shoulder">accessory ossicles of the shoulder</a><ul><li><a href="/articles/os-acromiale">os acromiale</a></li></ul>
  • -<a href="/articles/accessory-ossicles-of-the-elbow">elbow</a><ul>
  • +<a title="Accessory ossicles of the elbow" href="/articles/accessory-ossicles-of-the-elbow">accessory ossicles of the elbow</a><ul>
  • -<a href="/articles/accessory-ossicles-of-the-wrist">wrist</a><ul>
  • +<a title="accessory ossicles of the ​wrist" href="/articles/accessory-ossicles-of-the-wrist">accessory ossicles of the ​wrist</a><ul>
  • -<li>spine<ul>
  • +<li>accessory ossicles of the spine<ul>
  • -<li>hip<ul><li><a href="/articles/os-acetabuli">os acetabuli</a></li></ul>
  • +<li>accessory ossicles of the hip<ul><li><a href="/articles/os-acetabuli">os acetabuli</a></li></ul>
  • -<li>knee<ul>
  • +<li>accessory ossicles of the knee<ul>
  • -<a href="/articles/accessory-ossicles-of-the-foot">foot</a><ul>
  • +<a title="accessory ossicles of the ​foot" href="/articles/accessory-ossicles-of-the-foot">accessory ossicles of the ​foot</a><ul>

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