title: Opitz-C syndrome: on the nosology of mental retardation and trigonocephaly.
abstract: We report on two patients with a complicated form of trigonocephaly. The first patient has the Opitz-"C"-trigonocephaly syndrome. The second patient had initially a delayed motor development, but finally attained normal intelligence. A review of 22 patients with Opitz-C syndrome from the literature is presented. Most of the typical facial dysmorphism can be regarded as part of a trigonocephaly "sequence" rather than presenting characteristic features of a syndrome. More specific are the intra-oral anomalies, abnormally modelled ears, cardiac anomalies and neonatal hypotonia. All surviving patients are severely retarded. Since almost all patients are sporadic cases we suggest that the "C"-syndrome is a cytogenetically yet undetectable microdeletion syndrome.
authors: Department of Clinical Genetics, Academic Hospital Maastricht, The Netherlands.
authors: C
authors: C
authors: Schaap
authors: C T
authors: CT
authors: Schrander-Stumpel
authors: J P
authors: JP
authors: Fryns
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis / Q000235:genetics; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D003398:Craniosynostoses / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000175:diagnosis / Q000235:genetics*; D013577:Syndrome