Neurology Quiz #50: Cavernous Sinus Anatomy and Pathology

1. A 55-year-old man presents with a sudden onset of double vision. He is unable to abduct his right eye. Further examination reveals a decrease in sensation over the right forehead. A magnetic resonance imaging (MRI) scan of the head shows a mass in the region of the cavernous sinus. Which cranial nerve is most likely affected by the lesion? 

Question 1 of 5

2. A 30-year-old woman presents with a severe headache and fever. She has a history of recent sinusitis. On examination, she is found to have bilateral ptosis and fixed, dilated pupils. An MRI reveals thrombosis in a venous structure adjacent to the sella turcica. Which structure is most likely involved? 

Question 2 of 5

3. A patient presents to the clinic with a loss of corneal reflex. Which of the following pairs of cranial nerves is most likely affected?

Question 3 of 5

4. A 45-year-old man presents with a headache and recent onset of horizontal diplopia that worsens when looking to the left. On examination, he is unable to adduct his left eye past the midline. Which of the following cranial nerves is most likely affected? 

Question 4 of 5

5. Following a penetrating injury to the face, a patient presents with complete loss of sensation to the lower eyelid, upper lip, and upper gingiva on one side. Which of the following branches of the trigeminal nerve is most likely injured? 

Question 5 of 5


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