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Myelocele and myelomeningocele. Sagittal T1 weighted images of spine in cases of myelocele (A) and myelomeningocele (B). In myelocele the placode (arrowhead) is flush with the skin surface (arrow). In myelomeningocele (B), the protruding neural placode extends beyond the skin surface as there is enlargement of the underlying subarachnoid space (arrow).
