The anterior cruciate ligament (ACL) is one of the primary ligaments stabilizing the knee, controlling forward movement and rotation of the shin bone relative to the thigh bone. A tear is a partial or complete rupture of this ligament.
Most ACL tears are non-contact injuries — a sudden stop, pivot, or awkward landing, common in soccer, basketball, and skiing. Direct-contact injuries also occur, particularly in football.
A distinct "pop" felt at the time of injury, immediate swelling, a sense of the knee giving way or being unstable, and difficulty continuing activity.
Treatment depends heavily on the patient's activity level and goals. Older, less active patients with an isolated tear may do well with physical therapy alone ("prehab" and bracing). Athletes and active individuals who want to return to pivoting sports typically require ACL reconstruction, since the ligament does not heal on its own and a persistently unstable knee raises long-term risk of meniscus and cartilage damage.
Think you might have this condition? An accurate diagnosis starts with an exam — schedule a consultation with Dr. Thomson.
Schedule a ConsultThis page is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Every injury is different — always consult Dr. Thomson or another qualified physician for a personalized evaluation.