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anterior cruciate ligament (ACL) injury often is
called a sprain. A sprain occurs when the threads or fibers of the
ligament stretch or are torn.
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.
ByHealthwise StaffPrimary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency MedicineAdam Husney, MD - Family MedicineKathleen Romito, MD - Family MedicineSpecialist Medical ReviewerFreddie H. Fu, MD - Orthopedic Surgery
Current as ofMarch 21, 2017
Current as of:
March 21, 2017
William H. Blahd, Jr., MD, FACEP - Emergency Medicine
& Adam Husney, MD - Family Medicine & Kathleen Romito, MD - Family Medicine & Freddie H. Fu, MD - Orthopedic Surgery
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