Alternative titles and symbols : Craniosynostosis, metopic;
Description : Trigonocephaly occurs predominantly as a nonsyndromic craniosynostosis and has an
estimated prevalence of between 1:15,000 and 1:68,000 live births (summary by Vissers
et al., 2011). For a discussion of genetic heterogeneity of isolated trigonocephaly,
see TRIGNO1 (190440). A syndromic form of trigonocephaly is associated with monosomy
for an 8-Mb interval of chromosome 9p22.3 (see 158170).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the FRAS1-related extracellular matrix protein-1 gene (FREM1,
608944.0008);