title: Hirayama disease in a 17-year-old Chinese man.
abstract: Hirayama disease is an uncommon cervical myelopathy associated with neck flexion. It has been postulated to be related to the anterior shifting of the posterior dura of the lower cervical dural canal during neck flexion, resulting in lower cervical cord atrophy with asymmetric flattening. We report a case of Hirayama disease in a 17-year-old Chinese man and demonstrate the use of dynamic flexion magnetic resonance imaging of the cervical spine in the diagnosis of the disease.
authors.forename: C M
authors.initials: CM
authors.lastname: Sitt
authors.forename: L W
authors.initials: LW
authors.lastname: Fung
authors.forename: H Y
authors.initials: HY
authors.lastname: Yuen
authors.forename: A T
authors.initials: AT
authors.lastname: Ahuja
mesh_terms: D000293:Adolescent; D002681:China; D004388:Dura Mater / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009133:Muscular Atrophy / Q000473:pathology; D009482:Neurophysiology; D014897:Spinal Muscular Atrophies of Childhood / Q000175:diagnosis* / Q000628:therapy