Median cleft of the upper lip and maxilla

A rare median facial cleft characterized by a midline vertical cleft through the upper lip and premaxillary bone, which is highly variable in its extent and may also involve the nasal septum and central nervous system. Depending on the severity of the defect, associated manifestations include atrophy of midline structures, hypo-/hypertelorism, monophthalmia, proboscis, nasal deformity, median alveolar cleft, and short upper frenulum.