Alternative titles and symbols : Mandibulofacial dysostosis; TCS; Treacher collins syndrome; Treacher collins-franceschetti syndrome; MFD1; TCOF;
Description : Treacher Collins syndrome is a disorder of craniofacial development. The features
include antimongoloid slant of the eyes, coloboma of the lid, micrognathia, microtia
and other deformity of the ears, hypoplastic zygomatic arches, and macrostomia. Conductive
hearing loss and cleft palate are often present (Dixon, 1996). - Genetic Heterogeneity
of Treacher Collins Syndrome Treacher Collins syndrome-2 (TCS2; 613717) is caused
by heterozygous mutation in the POLR1D gene (613715) on chromosome 13q12.2. Treacher
Collins syndrome-3 (TCS3; 248390) is caused by compound heterozygous mutation in the
POLR1C gene (610060) on chromosome 6.;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the treacle gene (TCOF1, 154500.0001);