Figure 1.

Schematic view of four different types of hydrocephalus described in the literature by the terms asymmetric hydrocephalus, isolated lateral ventricle, isolated unilateral hydrocephalus, loculated ventricle, monoventricular hydrocephalus, unilateral hydrocephalus, and uniloculated hydrocephalus. (a) Partial dilation of the lateral ventricle. (b) Exclusive unilateral obstruction of the foramen of Monro. (c) Secondary unilateral foramen of Monro obstruction in shunted patients. (d) Asymmetric lateral ventricles with patent foramen of Monro