title: Foramen magnum syndrome caused by atlanto-occipital assimilation.
abstract: Atlanto-occipital assimilation is one of the most common congenital anomalies of the craniovertebral junction, and it usually is asymptomatic. We report a case of this malformation with unusual neurological symptoms which correlate with radiological findings. The anomaly caused the so-called foramen magnum syndrome, which was difficult to localize with neurological examination. The patient also had atlanto-axial dislocation, which was thought to enhance the symptoms with change of head/neck position.
authors.affiliation: Department of Neurology, Faculty of Medicine, Tokyo University, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Iwata
authors.forename: M
authors.initials: M
authors.lastname: Murata
authors.forename: N
authors.initials: N
authors.lastname: Nukina
authors.forename: I
authors.initials: I
authors.lastname: Kanazawa
mesh_terms: D000328:Adult; D001269:Atlanto-Occipital Joint / Q000002:abnormalities*; D005539:Foramen Magnum / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013117:Spinal Cord Compression / Q000175:diagnosis*; D013577:Syndrome