CASE 2
A 24-year-old medical student noticed while shaving one morning that he was unable to move the left side of his face. He worried that a serious problem, possibly a stroke, might have occurred. He hadhad influenza-like symptoms the week before this sudden attack.
Neurologic examination showed that the patient could not wrinkle his forehead on the left side or show his teeth or purse his lips on that side. Taste sensation was abnormal in the left anterior two-thirds of the tongue, and he had trouble closing his left eye. A test to determine tear secretion showed that secretion on the right side was normal, but the left lacrimal gland produced little fluid. Loud noises caused discomfort in the patient, who was in good health otherwise, and there were no additional signs or symptoms.
What is the differential diagnosis ? What is the most likely diagnosis ?