Relating to or involving an apophysis, which is a small bony projection or outgrowth from a bone.
From apophysis (Greek apo- 'away' + physis 'growth') + -ial suffix meaning 'of or relating to.' The term evolved from anatomy to describe small bone extensions that develop separately from the main bone and fuse later in development.
Apophysial fractures are super common in young athletes—these are breaks in the small bony bumps where muscles and tendons attach, especially at the heels and elbows, and they actually heal differently than regular fractures because they're still developing.
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