Vertebral artery dissection (VAD) is a rare cause of ischaemic injury to the cervical spinal cord. We report the case of a young man presenting an extended right VAD leading to a stroke within both the posterior inferior cerebellar artery (PICA) area and within that of a right sulcal branch of the anterior spinal artery responsible for a Brown-Sequard-like syndrome, but with sparing of the lateral part of the medulla oblongata.
Case reportIn September 2013, a 33-year-old man presented with sudden onset of vertigo and dizziness increased by postural changes and accompanied by vomiting. He had no tinnitus, diplopia, hearing or visual complaints. Medical history consisted of psoriasis and smoking. He practiced regularly kick-boxing. He was initially admitted to the ENT Department for suspicion of vestibular neuronitis and was treated with tapering doses of methylprednisolone for 6 days without improvement.One week later, he complained with right nuchal pain, slight right ptosis, numbness in the left hemibody under a Th3 level, and paraesthesia in the right hand and forearm.The neurological examination at that time revealed a horizontal and rotatory nystagmus in the right gaze and a right Claude-Bernard-Horner syndrome. Perception of pain and temperature was disturbed only under the left Th3 dermatoma. Right-sided deep tendon reflexes were increased. No other neurological abnormalities were detectable.Biological investigations including CSF analysis were normal, except for dyslipidemia.Brain MRI (Fig. 1) demonstrated a subacute ischaemic stroke of the right cerebellum within the PICA territory, and a tiny right vertebral artery. There was no lesion in the lateral part of the medulla oblongata. MR angiography showed a dissection of the right vertebral artery with a mural thrombus in its V2 segment, and a complete arterial occlusion from its ostium. Spinal cord MRI revealed a right lesion of 3 mm in diameter at the level of C3, matching perfectly with the neurological examination.The patient was treated with atorvastatin and acetylsalicylic acid. In July 2014, he had recovered from balance disturbances, but not from left thermoanalgesia. A control MR angiography showed no recanalization of the right vertebral artery.
DiscussionSpinal cord infarction (SCI) is rarely the consequence of a VAD. In a series of 111 patients with such a dissection, only two presented with spinal manifestations [1]. More recently, Hsu et al.[2] made a systematic review of the literature and found 17 cases (nine men and eight women) with VAD-associated SCI. The mean age was 40 years. The main symptoms were headache or neck pain (88 %), presence of a sensory level (76 %), and a Brown-Sequard