has part has part has_part characteristic of has modifier abnormal lateral ventricle morphology small brain ventricles small lateral ventricles decreased lateral ventricle size MP:0013908 decreased ventriculus lateralis size reduced lateral ventricle size decreased ventricle of cerebral hemisphere size decreased size of the cavity in each of the cerebral hemispheres derived from the cavity of the embryonic neural tube; they are separated from each other by the septum pellucidum, and each communicates with the third ventricle by the foramen of Monro, through which also the choroid plexuses of the lateral ventricles become continuous with that of the third ventricle abnormal decreased size telencephalic ventricle