Alternative titles and symbols : LPS; VDWS; Cleft lip and/or palate with mucous cysts of lower lip; Lip-pit syndrome; PIT;
Description : Van der Woude syndrome (VWS) is a dominantly inherited developmental disorder characterized
by pits and/or sinuses of the lower lip, and cleft lip and/or cleft palate (CL/P,
CP). It is the most common cleft syndrome. - Genetic Heterogeneity of van der Woude
Syndrome Most reported cases of VWS have been linked to chromosome 1q32-q41 (VWS1)
and are due to mutation in the IRF6 gene. VWS2 (606713) has been mapped to chromosome
1p34 and a mutation identified in the WDR65 gene (614259).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the interferon regulatory factor 6 gene (IRF6, 607199.0001);