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  • Title: Brief, transient Horner's syndrome can be the hallmark of a carotid artery dissection.
    Author: Leira EC, Bendixen BH, Kardon RH, Adams HP.
    Journal: Neurology; 1998 Jan; 50(1):289-90. PubMed ID: 9443497.
    Abstract:
    We describe a 41-year-old woman in whom the diagnosis of carotid artery dissection was suspected based on a recent history of anisocoria and ipsilateral ptosis that lasted 2 days. She had a normal neurologic examination, including no clinical evidence of anisocoria or ptosis. Subsequently, a cocaine test demonstrated pharmacologic Horner's syndrome. MRI confirmed the carotid dissection. This patient illustrates that a history of transient pupillary and eyelid abnormalities can lead to the diagnosis of a carotid dissection. Specific questioning about transient anisocoria and ptosis should be considered when a carotid artery dissection is suspected. Pharmacologic testing may be a useful tool in such instances.
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