title: Pectus excavatum and carinatum.
abstract: Pectus excavatum and carinatum are the most common morphological chest wall abnormalities. For both pectus excavatum and carinatum the pathogenesis is largely unknown although various hypotheses exist. Usually, exclusion of an underlying syndromal or connective tissue disorder is the reason for referral for genetic evaluation. A detailed anamnesis and family history are needed as well as a complete dysmorphological physical examination. If no features of an underlying disorder are detected, then the pectus excavatum/carinatum can be considered as an isolated abnormality and no further genetic studies seem indicated. Although cases of non-syndromal pectus excavatum/carinatum with a positive family history fitting Mendelian inheritance have been described, it is possible that these pedigrees represent multifactorial inheritance, as no genetic cause for familial isolated pectus excavatum/carinatum has been described yet. The recurrence risk for a non-familial iolated pectus excavatum/carinatum is unknown, but thought to be low. If other symptoms are found then appropriate further diagnostic studies are indicated as pectus excavatum/carinatum can be part of many syndromes. However, the most important and most frequently observed monogenic syndromes with pectus excavatum/carinatum are Marfan Syndrome and Noonan Syndrome.
authors.affiliation: Department of Pediatrics, AMC University Hospital, Amsterdam, The Netherlands; Department of Clinical Genetics, AMC University Hospital, Amsterdam, The Netherlands. Electronic address: j.m.cobben@amc.uva.nl.
authors.forename: Jan M
authors.initials: JM
authors.lastname: Cobben
authors.affiliation: Department of Anatomy, Embryology and Physiology, AMC University Hospital, Amsterdam, The Netherlands.
authors.forename: Roelof-Jan
authors.initials: RJ
authors.lastname: Oostra
authors.affiliation: Department of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Fleur S
authors.initials: FS
authors.lastname: van Dijk
mesh_terms: D005660:Funnel Chest / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D008382:Marfan Syndrome / Q000453:epidemiology / Q000235:genetics; D009634:Noonan Syndrome / Q000453:epidemiology / Q000235:genetics; D066166:Pectus Carinatum / Q000453:epidemiology / Q000209:etiology; D014424:Turner Syndrome / Q000453:epidemiology
keywords: Pectus carinatum; Pectus excavatum