An 18-year-old girl is brought to the emergency department due to a left lower extremity sports injury. The patient was playing basketball when he jumped and turned to the left suddenly avoiding contact with another player. He landed on his left foot, extending the knee with the foot internally rotated. He complains of instability of the left knee, and he feels sometimes that he will fall. The physical evaluation shows swelling of the left knee. In addition, there is anterior laxity of the tibia over the femur. Which of the following ligaments is most likely injured?

Question

Quizplus · Accepted Answer

Eductional Objective: Sudden change in the direction of the knee, or abnormal landing with excessive internal rotation or valgus stress may damage the anterior cruciate ligament. The ACL tears manifest with blood accumulation within the joint space. Physical examination shows anterior laxity of the tibial over the femur. Anterior drawer test and Lachman tests could be used to diagnose an ACL tear.

An 18-Year-Old Girl Is Brought to the Emergency Department Due