Knee Sports MCQs

A 25-year-old male sustains a twisting injury to his knee. Physical examination reveals an isolated increase in external tibial rotation of 15 degrees compared to the contralateral side when tested at 30 degrees of knee flexion. The external rotation normalizes and is symmetric at 90 degrees of flexion. Which structure is most likely injured?

A 24-year-old male presents 6 months after an anterior cruciate ligament (ACL) reconstruction complaining of a lack of full terminal extension. Sagittal MRI reveals that the tibial tunnel was placed too anteriorly. The graft is most likely impinging against which of the following structures?

A 24-year-old male sustains a traumatic knee injury. On physical examination, the dial test reveals 15 degrees of increased external rotation on the injured side compared to the normal side when tested at 30 degrees of knee flexion. However, at 90 degrees of knee flexion, the external rotation is symmetric bilaterally. What is the most likely injured structure?

A 21-year-old female recreational skier felt a "pop" in her knee during a twisting fall. An AP radiograph in the emergency department reveals a small, elliptical bony avulsion fragment just lateral to the lateral tibial plateau.

This radiographic finding is most highly associated with an injury to which of the following structures?

A 22-year-old soccer player sustains a twisting injury to his knee. Radiographs reveal a small avulsion fracture of the lateral tibial plateau. What is the most commonly associated ligamentous injury?

A 26-year-old female skier presents with a multiligamentous knee injury. Physical examination reveals a positive dial test with 15 degrees of increased external rotation at 30 degrees of flexion, but symmetric external rotation at 90 degrees of flexion. What is the most likely diagnosis?

A 20-year-old gymnast has persistent anterolateral ankle pain 6 months following a severe inversion injury. MRI reveals a 12-mm osteochondral lesion of the talus (OLT) on the anterolateral dome. Initial management with immobilization and physical therapy has failed. What is the most appropriate next step in management?

A 16-year-old female dancer experiences recurrent lateral patellar instability.

Imaging reveals a tibial tubercle-trochlear groove (TT-TG) distance of 22 mm and a normal patellar height. Which of the following surgical interventions is most appropriate?

Which of the following native structures serves as the primary restraint to lateral patellar translation at 0 to 20 degrees of knee flexion?

During reconstruction of the anterior cruciate ligament (ACL) using a bone-patellar tendon-bone autograft, the femoral tunnel is drilled too anteriorly. What is the most likely clinical consequence of this technical error?

A 12-year-old male soccer player with widely open physes sustains an acute, complete tear of the anterior cruciate ligament (ACL). He has recurrent episodes of giving way. To minimize the risk of physeal growth arrest or angular deformity during reconstruction, which of the following techniques is most appropriate?

A 24-year-old skier sustains a hyperextension and varus force to her knee. On physical examination, the dial test reveals 15 degrees of increased external rotation compared to the contralateral knee at 30 degrees of flexion, but symmetric external rotation at 90 degrees of flexion. Which injury pattern does this indicate?

A 45-year-old male feels a pop in the back of his knee while squatting. An MRI demonstrates a posterior root tear of the medial meniscus. What is the primary biomechanical consequence of this specific injury?

A 22-year-old football player sustains a high-energy tackle. Exam reveals increased external rotation of the tibia at 30 degrees of knee flexion but symmetric rotation at 90 degrees compared to the uninjured side. Varus stress is positive at 30 degrees. Which of the following structures is definitively injured?

A 35-year-old recreational basketball player reports catching and pain in his knee. MRI reveals a medial meniscal root tear. What are the biomechanical consequences of this injury if left untreated?

A 20-year-old football lineman is diagnosed with a posterior cruciate ligament (PCL) injury. On physical examination, the posterior drawer test is performed. At what degree of knee flexion is the PCL the primary restraint to posterior tibial translation?

A posterior root tear of the medial meniscus results in altered knee biomechanics that are most similar to which of the following conditions?