Abstract
Treacher Collins Syndrome is an autosomal dominant disorder in occurrence rate of 1 in 10,000 births and also known as the mandibulo-facial dysostosis. It is a syndrome with a wide variety of manifestations characterized by hypoplasia of the zygoma, mandible, abnormal auricle and external auditory canals. It is one of the concerned congenital anomalies in dentistry, as the various abnormalities are found in the craniofacial region due to the developmental disorder of the first and second brachial arches. The present findings of a 3-year-old boy affected with the Treacher Collins syndrome, who had undergone the dental caries treatment under the general anesthesia, were as follows.
1. Oblique palpebral fissures and absence of lower eye lid.
2. Abnormal external ear deformity, closed external auditory canals, and sensoryneural hearing loss.
3. Micrognathia and bird-like face.
4. Hypsistaphylia and macrostomia.
5. Rampant caries of the deciduous teeth and dysphagia.
6. The patient received dental caries treatment under general anesthesia because he had mental retardation and could not cooperate while in the chair in the clinics.
