Spina bifida is a variable defect in which the vertebral arch of the spinal column is either incompletely formed or absent. The term Bifida is from the Latin word Bifidus, or “left in 2 parts.” It is classified as a defect of the neural tube (i.e. the embryonic structure that develops into the spinal cord and brain). Neural tube defects have a range of presentations, from stillbirth to incidental radiographic findings of spina bifida occulta. The term myelodysplasia has been used as a synonym for Spina bifida. Lesions most commonly occur in the lumbar and sacral regions but can be found anywhere along the entire length of the spine. It is a treatable spinal cord malformation that occurs in varying degrees of severity.