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Congenital defects of closure of one or more vertebral arches, which may be associated with malformations of the spinal cord, nerve roots, congenital fibrous bands, lipomas, and congenital cysts. These malformations range from mild (e.g., SPINA BIFIDA OCCULTA) to severe, including rachischisis where there is complete failure of neural tube and spinal cord fusion, resulting in exposure of the spinal cord at the surface. Spinal dysraphism includes all forms of spina bifida. The open form is called SPINA BIFIDA CYSTICA and the closed form is SPINA BIFIDA OCCULTA. (From Joynt, Clinical Neurology, 1992, Ch55, p34)
Entry Term(s)
Cleft Spine
Open Spine
Rachischisis
Schistorrhachis
Spina Bifida
Spinal Dysraphia
Status Dysraphicus
NLM Classification #
WE 730
Public MeSH Note
1991; see STATUS DYSRAPHICUS 1964-90 ; for SPINA BIFIDA see SPINA BIFIDA OCCULTA 1978-1990, see SPINAL DYSRAPHISM 1966-1977
History Note
1991(1964); for SPINA BIFIDA use SPINA BIFIDA OCCULTA 1978-1990, use SPINAL DYSRAPHISM 1966-1970
Congenital defects of closure of one or more vertebral arches, which may be associated with malformations of the spinal cord, nerve roots, congenital fibrous bands, lipomas, and congenital cysts. These malformations range from mild (e.g., SPINA BIFIDA OCCULTA) to severe, including rachischisis where there is complete failure of neural tube and spinal cord fusion, resulting in exposure of the spinal cord at the surface. Spinal dysraphism includes all forms of spina bifida. The open form is called SPINA BIFIDA CYSTICA and the closed form is SPINA BIFIDA OCCULTA. (From Joynt, Clinical Neurology, 1992, Ch55, p34)