A 28-year-old man presents after a motor vehicle collision in which his flexed knee struck the dashboard. He reports knee pain and instability. Vital signs show BP 128/82 mmHg, HR 92/min, RR 16/min, and temperature 37°C. Physical examination demonstrates posterior displacement of the tibia relative to the femur on drawer testing. Anterior cruciate ligament examination is negative. Knee X-rays show no fracture. Which of the following structures is most likely injured?
- A)Medial collateral ligament
- B)Anterior cruciate ligament
- C)Lateral collateral ligament
- D)Medial meniscus
- E)Posterior cruciate ligamentGABARITO
Explicação
Dashboard trauma with posterior translation of the tibia is classic for posterior cruciate ligament injury. The PCL prevents posterior displacement of the tibia relative to the femur. Ver explicação completa e trilha adaptativa →