Treacher Collins syndrome (TCS) is a rare genetic disorder characterized by distinctive abnormalities of the head and face area resulting from underdevelopment (hypoplasia) of certain facial structures including the jaw, cheekbones and nearby structures (zygomatic complex). Craniofacial abnormalities tend to involve the cheekbones, jaws, mouth, ears, and/or eyes. In addition to the various facial abnormalities, affected individuals may have ma  Read More

CSS is characterized by distinctive abnormalities of the head and facial (craniofacial) region with affected individuals often described as having coarse facial features that become more prominent with age. Affected individuals may have an unusually small or large head (micro- or macrocephaly); a wide mouth with full, prominent lips; a broad nasal tip; a low nasal bridge; and an abnormally long vertical groove between the nose and the upper li  Read More