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1. A congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column; frequently accompanied by hydrocephalus and mental retardation

Type of: birth defect, congenital abnormality, congenital anomaly, congenital defect, congenital disease, congenital disorder

Encyclopedia: Myelomeningocele