A 12-Year-Old Boy Is Being Evaluated for Worsening Headaches for the Past

A 12-year-old boy is being evaluated for worsening headaches for the past several months.  He also has had paresthesia, weakness, and stiffness of the extremities.  MRI of the brain reveals an expansile mass in the lower pons, as shown in the image below: Which of the following is most likely to be observed in this patient due to direct involvement of nerve nuclei by the brain lesion?

A) Asymmetric pupils
B) Spontaneous nystagmus
C) Tongue atrophy
D) Trapezius weakness
E) Vertical diplopia

Correct Answer:

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