title: Left microtia in one monozygotic twin. A case report.
abstract: Monoamniotic twins are rare, with a double survival rate of only 40%. Congenital anomalies, while more common among twins in general, are particularly common in monoamniotic twins, with the increase principally the result of structural defects. Discordant phenotypes have been reported, but a malformation of the external ear in one twin has not. In a case of double survival of monoamniotic twins, one had left microtia and a single umbilical artery.
authors.affiliation: Department of Obstetrics and Gynecology, Wilford Hall United States Air Force Medical Center, Lackland Air Force Base, TX 78236-5300.
authors.forename: G S
authors.initials: GS
authors.lastname: Neal
authors.forename: G D
authors.initials: GD
authors.lastname: Hankins
mesh_terms: D000015:Abnormalities, Multiple / Q000453:epidemiology / Q000235:genetics / Q000473:pathology*; D000328:Adult; D004431:Ear, External / Q000002:abnormalities*; D005260:Female; D006801:Humans; D015994:Incidence; D014430:Twins, Monozygotic; D014469:Umbilical Arteries / Q000002:abnormalities*