Microform Holoprosencephaly, also known as holoprosencephaly, minor form, is related to holoprosencephaly 9 and hypopituitarism. An important gene associated with Microform Holoprosencephaly is DISP1 (Dispatched RND Transporter Family Member 1), and among its related pathways/superpathways are Signal Transduction and Nervous system development. Affiliated tissues include brain and pituitary, and related phenotypes are choanal atresia and midnasal stenosis