[Girl with ptosis, anisocoria and hemiparesis].

A 9-year-old girl complained of a sudden severe headache during skiing, there was no previous trauma. She was nauseous, vomited and had weakness of the left arm and leg. She developed a right-sided ptosis, miosis and a contralateral hemiparesis, consistent with Horner's syndrome. MRI showed acute infarction of the right hemisphere caused by a dissection of the internal carotid artery. The patient recovered partially with rehabilitation.