title: Ectopic midline spinal ganglion in diastematomyelia: a study of its connections.
abstract: The connections of an ectopic midline spinal ganglion associated with an asymptomatic sacral diastematomyelia were studied. The ganglion was intercalated in the ventral root of one hemicord and sent its efferents to the dorsal root of the other hemicord. The afferents joined the anterior root to form a midline intradural spinal nerve in the cauda equina. Islands of ectopic glia were present in both roots and the spinal nerve. Both the midline position of the ganglion and the glial heterotopias can be tentatively explained by the failure of incorporation of the dorsal cell wedge ("Zwischenstrang") into the divided neural tube.
authors.affiliation: Department of Pathology, University of Virginia School of Medicine, Charlottesville 22908.
authors.forename: G W
authors.initials: GW
authors.lastname: Ross
authors.forename: S A
authors.initials: SA
authors.lastname: Swanson
authors.forename: E
authors.initials: E
authors.lastname: Perentes
authors.forename: H
authors.initials: H
authors.lastname: Urich
mesh_terms: D002828:Choristoma / Q000473:pathology*; D005727:Ganglia, Spinal; D006801:Humans; D008297:Male; D008875:Middle Aged; D009436:Neural Tube Defects / Q000473:pathology*; D013116:Spinal Cord / Q000473:pathology; D013120:Spinal Cord Neoplasms / Q000473:pathology*