Dandy-Walker variant with prenatally detected hydrocephalus in a 34-week-old infant. US image obtained through the mastoid fontanelle shows dilatation of all the ventricles. The frontal horns (F [, left]), foramen of Monro (
), third ventricle (3), aqueduct (
), fourth ventricle (4), and temporal horns (T [
, bottom right]) are clearly depicted. The inferior vermis (* [
, top right]) is hypoplastic, resulting in enlargement of the vallecula.
Baby head study is commonly applied on premature newborn for r/o intraventricular hemorrhage(IVH), or on slow developed babies with bigger heads for r/o hydrocephalus. Hydrocephalus is a disease that caused by unbalance of CSF circulation; CSF which goes into cephalic ventricles is more than the fluid which exits the ventricals.
