A 59-Year-Old Man Comes to the Emergency Department with Diplopia

question 750

Multiple Choice

A 59-year-old man comes to the emergency department with diplopia that started several hours ago.  His past medical history is significant for long-standing diabetes with poor glycemic control, right-knee osteoarthritis, and peptic ulcer disease.  Physical examination shows right-sided ptosis with the right pupil in the inferolateral position.  Pupils are equal in size and reactive to light bilaterally.  This patient's condition is most likely due to which of the following etiologies?

• A)Nerve compression
• B)Nerve inflammation
• C)Nerve ischemia
• D)Lacunar stroke
• E)Muscle infiltration

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Definitions:

Day Length

The duration of daylight hours in a 24-hour period, which varies depending on the season and geographical location.

Animal Migration

The movement of groups of animals from one location to another, often seasonally, in response to changing environmental conditions.

Dominance Hierarchies

Social structures in animal societies where individuals are ranked based on behavior, strength, or some other criteria, affecting access to resources or mates.

Primate Societies

The complex social structures and behaviors observed in primates, including humans, monkeys, and apes.