Fig. 9

Foetus at 23 + 3 GW with a Chiari II malformation. (a) The sagittal T2-w image of the whole foetus shows a lumbosacral neural tube defect (ellipsis) and a herniation of the cerebellum (arrow). The sagittal (b) and axial (c) T2-w images of the body and pelvis show a large spinal defect referring to a meningomyelocele that extends from the level of L2 to the end of the sacrum (ellipsis). The axial T2-w image of the brain demonstrates internal hydrocephaly with marked widening of the lateral ventricles (d)