Lambert syndrome is a very rare syndrome described in four sibs of one French family and characterized by branchial dysplasia (malar hypoplasia, macrostomia, preauricular tags and meatal atresia), club feet, inguinal herniae and cholestasis due to paucity of interlobular bile ducts and intellectual deficit. The disease is Lambert syndrome (MONDO_0009507, a Monarch Disease Ontology entry). Also known as: branchial dysplasia-intellectual disability-inguinal hernia syndrome.