Left subclavian artery aneurysm secondary to syphilitic arteritis presenting with a right ischemic cerebellar infarction.

We report a 28-year-old male who presented with severe vertigo, vomiting, diplopia, clumsiness of right extremities. Physical examination revealed low reading of blood pressure in the left upper limb and evidence of mild left upper limb ischemia. On neurological examination he had right cerebellar ataxia. Computed tomography and magnetic resonance imaging, revealed an acute right cerebellar infarction in the anterior inferior cerebellar artery territory. Doppler ultrasono-graphy revealed an aneurysm of the left subclavian artery. The patient was tested positive for serology of syphilis.