Skip to Content
Home > Patients & Visitors > Health Library > Types of ACL Injuries
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 MedicineSpecialist Medical ReviewerFreddie H. Fu, MD - Orthopedic Surgery
Current as ofMay 22, 2015
Current as of:
May 22, 2015
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Freddie H. Fu, MD - Orthopedic Surgery
To learn more about Healthwise, visit Healthwise.org.
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Send Us Your Feedback
North Kansas City Hospital