What is Holoprosencephaly? In this ultrasound lecture you will learn how to image and diagnose holoprosencephaly using 2D and 3D/4D ultrasound. In this 28 slides ultrasound lecture you will learn: Definition of Holoprosencephaly (HPE). Embryologic Basis of HPE. Sequence of Interference with the Activity of the Prechordal Mesenchyme. Classification of HPE. According to the degree…Share to your favorite social network then click Read more button below to continue reading.