2nd November 2021

A 65-year-old man presented with weakness in his left leg

A 65-year-old man presented with weakness in his left leg. These symptoms started abruptly while the patient was watching television with his wife on the sofa. The wife reported that the patient did not fall on the ground. When the doctor approached the patient from the left side of his bed, the patient failed to notice him. He did not have a fever. Which is the most likely cause of his symptoms?

Select the SINGLE most appropriate option from the list below. Select ONE option only.