The student nurse is explaining myelomeningocele to a family. Which description of myelomeningocele by the student does not require intervention by the nurse?

Choice A rationale This describes spina bifida occulta, which is the least severe form of neural tube defect, involving incomplete fusion of the vertebral arches without external sac or herniation of the spinal cord or meninges. Myelomeningocele, by contrast, is a severe form where the meninges and spinal cord tissue protrude, hence this statement is inaccurate for myelomeningocele and would require intervention. Choice B rationale This description corresponds to an encephalocele, a neural tube defect where a sac of meninges and brain tissue protrudes through a defect in the skull, typically in the occipital region. Myelomeningocele is a defect of the spine, not the base of the skull, therefore this incorrect anatomical explanation necessitates the nurse's intervention for clarification. Choice C rationale This description accurately defines a meningocele, which is a neural tube defect where only a sac containing meninges and spinal fluid protrudes through a vertebral defect. Myelomeningocele is more severe because it also includes the herniation of a portion of the spinal cord, making this statement incomplete and requiring correction. Choice D rationale This is the correct and comprehensive description of myelomeningocele, the most common and severe form of spina bifida. It involves the herniation of the meningeal sac containing cerebrospinal fluid and a portion of the spinal cord and/or nerve roots through a defect in the vertebral column, which results in varying degrees of neurological deficit.