A-46-year-old woman with a prior history of a spontaneously resolving
right central retinal artery occlusion presented with an acute right t
hirrd order Horner's syndrome and vague ocular pain. Magnetic resonanc
e angiography demonstrated a right internal carotid artery dissection.
The dissection improved on anticoagulation therapy. Marfans syndrome
or Ehlers-Danlos syndrome was suspected but ruled out by clinical crit
eria and skin biopsy respectively.