abnormal embryonic/fetal subventricular zone morphology +
abnormal gastrula morphology
abnormal germ layer morphology +
abnormal gonadal ridge morphology +
abnormal head fold morphology +
abnormal intraembryonic coelom morphology
abnormal limb bud morphology +
abnormal mesenchyme morphology +
abnormal mesonephros morphology +
abnormal neural fold morphology +
abnormal neural plate morphology +
any structural anomaly of the flat, thickened layer of ectodermal cells in the neuroectodermal area of the embryo's dorsal surface that develops into the neural tube and neural crest