See a picture of the knee and the ACL.
An ACL injury is classified as a grade I, II, or III sprain.
An ACL avulsion occurs when the ACL is torn away from either the upper leg bone or lower leg bone. This type of injury is more common in children than adults.
An avulsion fracture occurs when the ACL is torn away from the leg bone with a piece of the bone.
|Primary Medical Reviewer||William H. Blahd, Jr., MD, FACEP - Emergency Medicine|
|Specialist Medical Reviewer||Freddie H. Fu, MD - Orthopedic Surgery|
|Last Revised||April 5, 2012|
Last Revised: April 5, 2012
Author: Healthwise Staff
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