Spina bifida can happen anywhere along the spine if the neural tube does not close all the way. The backbone that protects the spinal cord does not form and close as it should. This often results in damage to the spinal cord and nerves.
This is a birth defect, consequence of incomplete closing of the backbone and membranes around the spinal cord. Problems that appear with this condition are: poor ability to walk, accumulation of fluid in the brain (hydrocephalus), latex allergy..