title: Thoracoabdominal situs: a practical approach accompanied by a short history of descriptive terms.
abstract: Classification systems for thoracoabdominal situs have been the subject of numerous reports, yet confusion persists. This essay presents an abbreviated historical review of the currently used terms, briefly discusses some of the nomenclature controversies, and proposes a classification system that more closely adheres to the etymology of the descriptors, especially "heterotaxy."
authors.affiliation: Children's Heart Center-Nevada, Las Vegas, NV, 89109, USA. WNevans50@aol.com
authors.forename: William N
authors.initials: WN
authors.lastname: Evans
mesh_terms: D006801:Humans; D012857:Situs Inversus / Q000175:diagnosis*