microform holoprosencephaly (MONDO_0017219) is a benign form of holoprosencephaly (HPE) characterized by midline defects without the typical HPE defect in brain cleavage. Also known as: HPE, minor form, HPE-L, HoloprosencC)phalie, minor form, Holoprosencéphalie, minor form, Microform HPE, holoprosencephaly-like.