Variant Names: 
Treacher Collins-Franceschetti syndrome (TCOF), Mandibulofacial dysostosis (MFD1)

Treacher Collins syndrome (TCS) also known as mandibulofacial dysostosis or Treacher Collins-Franceschetti syndrome is a disorder of craniofacial development with an estimated incidence of 1:50,000 live births.  The most common findings include downward slanting palpebral fissures and hypoplasia of the zygomatic complex and more

Tests Available

By gene: POLR1D
Sanger Sequencing
Test Code: 1357
Deletion / Duplication
Test Code: 1358
NGS/Del Dup Comprehensive
Test Code: 1678

Test Details

Technical Information
Disease Groups: 
Craniosynostosis and Craniofacial Disorders
Hearing Disorders
CPT Codes: 
81479 x 1
Turnaround Time: 
Typically 1 to 2 weeks from receipt of a sample in the laboratory. All cases involving ongoing pregnancies will be expedited.
Non-Prenatal Specimens: 
  1. Whole blood: purple-top (EDTA) tube, minimum of 3 ml
  2. Genomic DNA: a minimum of 3 µg (at a concentration of at least 30 ng/µl)
  3. Fibroblasts: 2 confluent T-25 flasks
  4. Saliva: only samples collected in Oragene DNA Self-Collection Kit or Oragene Saliva Collection Kit for Young Children are accepted
Prenatal Specimens: 
  1. Cultured cells: 2 confluent T-25 flasks derived from amnio or CVS samples
  2. Genomic DNA: a minimum of 3 µg (at a concentration of at least 30 ng/µl)

Ship all specimen types at room temperature by overnight courier. Do not freeze.

Search Tests

TIP: enter a partial disorder name or gene to widen your search