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Related Glossary Terms:
- Cleft PalateFailure of the roof of the mouth to close between weeks 8 to 12 of pregnancy, when bone and muscle grow in from both sides of the upper jaw to divide the mouth from the nose.
- First and Second Pharyngeal Arch SyndromesA variety of congenital syndromes affecting the face occur due to defects involving the first and second Branchial Arches.
- Visceral Arch SyndromeCongenital defects caused by a failure of neural crest cells to migrate into the first pharyngeal arch which can produce facial anomalies. Examples of first arch syndromes include Treacher Collins syndrome and Pierre Robin syndrome.