A 1-year-old girl is brought to the clinic for a routine checkup. The child appears normal except for a dimpling of the skin in the lumbar region with a tuft of hair growing over the dimple. You reassure the mother that this condition is seen in 10% to 25% of births and normally has no ill effects. What is this relatively common condition that results from incomplete embryologic development?
Meningomyelocele Meningocele Spina bifida occulta Spina bifida cystica