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Can Fam Physician. 2010 May; 56(5): 439.
PMCID: PMC2868614

Question: Can you identify this condition?

Davin Johnson and Sanjay Sharma, MD MBA MSc FRCSC
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A 30-year-old woman presents with a 4-month history of a slightly droopy left upper eyelid. She has no other ocular complaints. On examination, visual acuity is 6/6 in each eye. There is a 1- to 2-mm ptosis of the left upper eyelid. Motility is otherwise normal. Pupil examination reveals anisocoria, with the left pupil smaller, especially in dark surroundings. Results of the rest of the examination, including fundoscopy, are normal, and the patient is otherwise healthy.

This most likely diagnosis is

  1. Horner syndrome
  2. Myasthenia gravis
  3. Grave disease
  4. Third-nerve palsy

Answer on page 443


Articles from Canadian Family Physician are provided here courtesy of College of Family Physicians of Canada