Multiple hereditary exostoses and stroke due to vertebral artery dissection.

UNLABELLED: Vascular complications related to multiple hereditary exostoses are uncommon. We present a 39-year-old male patient with multiple exostoses in the upper and lower limbs with an associated positive familial history of such lesions. He experienced a sudden onset of left-side ataxia and hypoesthesia secondary to a left lateral medullary infarction, which was due to a stenotic-pattern vertebral artery dissection (V1-V4). This complication is very rare as a differential diagnosis in the vertebro-basilar dissection spectrum, and a nonspecific relation has been found. ABBREVIATIONS: MHEMultiple hereditary exostosesATangiotomographyVADvertebral artery dissectionCADcervical artery dissectionOIosteogenesis imperfecta.