A 65-Year-Old Man Comes to the Office Due to Right

A 65-year-old man comes to the office due to right lower abdominal pain that radiates to his groin and difficulty walking for the past week.  Climbing stairs has been particularly hard for him, and he has fallen several times due to knee buckling.  Medical history is significant for diabetes mellitus, hypertension, and atrial fibrillation.  The patient takes warfarin for chronic anticoagulation.  On physical examination, the right patellar reflex is decreased compared to the left.  Abdominal CT scan is shown below: Which of the following additional findings is most likely to be seen in this patient?

A) Impaired adduction of the right thigh
B) Loss of sensation on the anterior aspect of the right thigh
C) Loss of sensation on the dorsum of the right foot
D) Loss of sensation on the sole of the right foot
E) Weakened abduction of the right thigh

Correct Answer:

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