Lobar Holoprosencephaly is related to cleft lip and ventricular septal defect. An important gene associated with Lobar Holoprosencephaly is PTCH1 (Patched 1), and among its related pathways/superpathways are Nervous system development and Signal Transduction. Affiliated tissues include brain and olfactory bulb, and related phenotypes are hypotelorism and feeding difficulties