Closed lumbar and sacral abnormalities

Examples of abnormal physical examination findings of the spine in children that require evaluation with magnetic resonance imaging and neurosurgical referral. All four defects should be investigated for a tethered cord:
(A) Sacral spinal skin abnormality.
(B) Closed lipomyelomeningocele.
(C) Spinal dimple with lipomeningocele.
(D) Sacral dimple.