A 55-year-old woman with hypertension presents with sudden severe headache and diplopia. Vital signs show BP 168/98 mmHg, HR 88/min, RR 16/min, temp 37.2°C. Examination reveals right ptosis, right eye deviated down and out, and a dilated poorly reactive right pupil. MRI brain demonstrates a posterior communicating artery aneurysm. There is no neck stiffness or photophobia. She denies recent trauma or anticoagulant use. Which of the following is the most likely cause?

  1. A)Lesion of the medial longitudinal fasciculus
  2. B)PICA infarction
  3. C)Basilar artery thrombosis
  4. D)Posterior communicating artery aneurysm compressing CN IIIGABARITO
  5. E)Microvascular ischemic injury to CN VI

Explicação

Posterior communicating artery aneurysm compressing CN III is the correct answer because a painful oculomotor palsy with ptosis, down-and-out eye, and pupillary dilation is classic for a compressive third nerve lesion. Ver explicação completa e trilha adaptativa →

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