In this condition, the prenatal spinal deformities result in only the meninges, and not the spinal nerves, slipping into the gaps between the deformed vertebrae.

这种患儿先天的脊柱畸形只影响脑脊膜，脑脊膜疝入畸形的椎骨间缝隙，而脊神经不受影响。