Treacher-Collins syndrome Treacher Collins syndrome 1 https://github.com/monarch-initiative/mondo/issues/4948 OMIM:154500 Treacher Collins syndrome type 1 Treacher-Collins syndrome 1 TCOF1 Treacher-Collins syndrome DOID:0080789 MONDO:0007944 TCS1 GARD:0024589 Treacher-Collins syndrome caused by mutation in TCOF1 Any Treacher-Collins syndrome in which the cause of the disease is a mutation in the TCOF1 gene.