Unfortunately, I learned about this because it happened to one of my soccer teammates.
An avulsion fracture is the separation of a small fragment of bone cortex at the site of attachment of a ligament or tendon.
It occurs when an injury causes a ligament or tendon to tear off (avulse) a small piece of a bone to which it’s attached. The injury may be due to direct trauma, such as a hard tackle in football, or indirect trauma, such as an aggressive pivot in soccer or basketball.
Ouch.
getting older & wiser... 