Following a Ground-Level Fall at Home, a 46-Year-Old Woman Is

Following a ground-level fall at home, a 46-year-old woman is transported to the emergency room by ambulance. She slid out of the shower and landed on her left knee on the tile floor. The patient is unable to walk due to acute left knee pain and edema. The examination reveals a knee contusion and soft tissue edema, as well as a substantial knee effusion. The picture below shows an X-ray of the knee: Which of the following examination findings would most likely be seen in this patient?

A) Backward movement of the tibia against a fixed femur
B) Excessive joint widening on valgus stress
C) Forward movement of the tibia against a fixed femur
D) Inability to extend the knee against gravity
E) Inability to flex the knee against resistance

Correct Answer:

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