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• W4323284206 abstract "No AccessJournal of UrologyPediatric Urology1 Dec 1998HYPOSPADIAS IS RELATED TO BIRTH WEIGHT IN DISCORDANT MONOZYGOTIC TWINS LOUISE FREDELL, PAUL LICHTENSTEIN, NANCY L. PEDERSEN, JAN SVENSSON, and AGNETA NORDENSKJOLD LOUISE FREDELLLOUISE FREDELL More articles by this author , PAUL LICHTENSTEINPAUL LICHTENSTEIN More articles by this author , NANCY L. PEDERSENNANCY L. PEDERSEN More articles by this author , JAN SVENSSONJAN SVENSSON More articles by this author , and AGNETA NORDENSKJOLDAGNETA NORDENSKJOLD More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(01)62294-8AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: Hypospadias is a common urogenital malformation in boys. The etiology is unknown but genetic and environmental factors are involved. Because monozygotic twins have the same genetic constitution, we studied disease discordant twin pairs to evaluate environmental risk factors while controlling for genetic effects. Materials and Methods: We used questionnaires to identify 28 male twins discordant for hypospadias at 4 pediatric surgical clinics in Sweden. Using deoxyribonucleic acid fingerprinting, and histopathological examination of the placenta and fetal membranes 18 twin pairs were diagnosed as monozygotic. Results: In 16 of the 18 monozygotic pairs discordant for hypospadias the twin with the lowest birth weight has hypospadias. Mean difference in birth weight was 498 gm. (t = 3.8, p <0.01). Conclusions: Environmental factors associated with low birth weight are involved in the etiology of hypospadias. References 1 : A joint international study on the epidemiology of hypospadias. Acta Paed. Scand.1986; 324: 1. Google Scholar 2 : Genetic and environmental factors in hypospadias. J. Med. Genet.1990; 27: 559. Google Scholar 3 : Study of the incidence of hypospadias in Rochester, Minnesota, 1940-1970, and a case-control comparison of possible etiologic factors. Mayo Clin. Proc.1974; 49: 52. Google Scholar 4 : Aetiological factors in hypospadias. J. Med. Genet.1986; 23: 333. Google Scholar 5 : Genetic studies on hypospadias in males. J. Med. Genet.1971; 8: 153. Google Scholar 6 : Hypospadias with special reference to etiology. Thesis. Kopenhamn: Munksgaard1953. Google Scholar 7 : Hypospadias: a familial study. J. Urol.1979; 121: 474. Link, Google Scholar 8 : Observations on the epidemiology of simple hypospadias. Brit. Med. J.1973; 1: 768. Google Scholar 9 : Aetiological studies of hypospadias in Hungary. Hum. Hered.1979; 29: 166. Google Scholar 10 : Hypospadias: an epidemiological study in Latin America. Amer. J. Med. Genet.1981; 10: 5. Google Scholar 11 : Genes, environments and sex: factors of importance in atopic diseases in 7-9-year-old Swedish twins. Allergy1997; 52: 1079. Google Scholar 12 : Ciba Foundation Colloquia on Endocrinology1967; 16: 31. Google Scholar 13 : Maternal serum human chorionic gonadotropin during early pregnancy resulting in boys with hypospadias or cryptorchidism. Brit. J. Urol.1995; 76: 389. Google Scholar 14 : A twin-pronged attack on complex traits. Nat. Genet.1997; 17: 387. Google Scholar From the Departments of Molecular Medicine and Pediatric Surgery, Karolinska Hospital and Division of Genetic Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden© 1998 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited byFossum M (2020) Editorial CommentJournal of Urology, VOL. 203, NO. 5, (1023-1023), Online publication date: 1-May-2020.Andersson M, Sjöström S, Wängqvist M, Örtqvist L, Nordenskjöld A and Holmdahl G (2018) Psychosocial and Sexual Outcomes in Adolescents following Surgery for Proximal Hypospadias in ChildhoodJournal of Urology, VOL. 200, NO. 6, (1362-1370), Online publication date: 1-Dec-2018.Canning D (2018) Re: Higher Incidence of Hypospadias in Monochorionic TwinsJournal of Urology, VOL. 195, NO. 3, (738-739), Online publication date: 1-Mar-2016.Nordenvall A, Frisén L, Nordenström A, Lichtenstein P and Nordenskjöld A (2018) Population Based Nationwide Study of Hypospadias in Sweden, 1973 to 2009: Incidence and Risk FactorsJournal of Urology, VOL. 191, NO. 3, (783-789), Online publication date: 1-Mar-2014.FRISÉN L, SÖDERHÄLL C, TAPPER-PERSSON M, LUTHMAN H, KOCKUM I and NORDENSKJÖLD A (2018) GENOME-WIDE LINKAGE ANALYSIS FOR HYPOSPADIAS SUSCEPTIBILITY GENESJournal of Urology, VOL. 172, NO. 4 Part 1, (1460-1463), Online publication date: 1-Oct-2004.FREDELL L, KOCKUM I, HANSSON E, HOLMNER S, LUNDQUIST L, LÄCKGREN G, PEDERSEN J, STENBERG A, WESTBACKE G and NORDENSKJÖLD A (2018) HEREDITY OF HYPOSPADIAS AND THE SIGNIFICANCE OF LOW BIRTH WEIGHTJournal of Urology, VOL. 167, NO. 3, (1423-1427), Online publication date: 1-Mar-2002. Volume 160Issue 6 Part 1December 1998Page: 2197-2199 Advertisement Copyright & Permissions© 1998 by American Urological Association, Inc.MetricsAuthor Information LOUISE FREDELL More articles by this author PAUL LICHTENSTEIN More articles by this author NANCY L. PEDERSEN More articles by this author JAN SVENSSON More articles by this author AGNETA NORDENSKJOLD More articles by this author Expand All Advertisement PDF downloadLoading ..." @default.
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