YOUR DENTIST

Clinical Correlate
PHARYNGEAL ARCH ABNORMALITIES
TREACHER COLLINS

A hereditary condition affecting the head and neck. Thought to be caused by a defect in the gene or chromosome 5. Children of an affected parent have a 50% risk of having the syndrome.

Clinical manisfestations include:
• Downslanting eyes
• Notching of the lower eyelids
• Hypoplastic mandible
• Hypoplastic Zygomatic bones (zygomas)
• Underdeveloped or malformed ears or "sideburns," or both, are prominent.

Common associated problems include:
• Hearing loss
• Eating/breathing difficulties
• Cleft palate