Median cleft lip/mandible

A rare median facial cleft characterized by median cleft of the lower lip (ranging in extent from a notch in the vermilion to a complete cleft involving the tongue, lower lip, and chin, and extending to the cervical region), median cleft of the mandible (ranging from notching to a complete cleft), and anomaly of the tongue including bifid tongue and tongue tie. Associated features in severe cases may include absent hyoid, thyroid cartilage, and manubrium sterni, as well as atrophic neck muscles.