Solitary Median Maxillary Central Incisor, also known as single upper central incisor, is related to holoprosencephaly 1 and holoprosencephaly. An important gene associated with Solitary Median Maxillary Central Incisor is SHH (Sonic Hedgehog Signaling Molecule), and among its related pathways/superpathways are Signaling by Hedgehog and CKAP4 signaling pathway map. Affiliated tissues include pituitary and kidney, and related phenotypes are holoprosencephaly and anterior hypopituitarism