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Craniopagus and rachipagus conjoined twins in triplet pregnancy: challenges in early prenatal diagnosis at 12 weeks.
Ultrasound Obstet Gynecol
November 2022
Department of Obstetrics and Gynecology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, People's Republic of China.
Two is a Crowd: Two is a Crowd: On the Enigmatic Etiopathogenesis of Conjoined Twinning.
Clin Anat
July 2019
Department of Medical Biology, Section Clinical Anatomy & Embryology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
In this article, we provide a comprehensive overview of multiple facets in the puzzling genesis of symmetrical conjoined twins. The etiopathogenesis of conjoined twins remains matter for ongoing debate and is currently cited-in virtually every paper on conjoined twins-as partial fission or secondary fusion. Both theories could potentially be extrapolated from embryological adjustments exclusively seen in conjoined twins.
View Article and Find Full Text PDFConjoined twins: From conception to separation, a review.
Clin Anat
April 2017
Department of Anatomical Sciences, School of Medicine, St. George's University, Grenada, West Indies.
Conjoined twins are suggested to result from aberrant embryogenesis. The two main theories proposed to explain the phenomena are fission and fusion. The incidence rate is 1 in 50,000 births; however, since about 60% of the cases are stillborn, the true incidence is approximated at 1 in 200,000.
View Article and Find Full Text PDFImaging in the preoperative assessment of conjoined twins.
Radiographics
October 2001
Department of Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, London WC1N 3JH, England.
Conjoined twins are rare and present a unique challenge to pediatric surgeons and radiologists. Planning of surgical separation is aided by accurate preoperative imaging. Such twins are classified according to the most prominent site of connection: the thorax (thoracopagus), abdomen (omphalopagus), sacrum (pygopagus), pelvis (ischiopagus), skull (craniopagus), face (cephalopagus), or back (rachipagus).
View Article and Find Full Text PDFThe epidemiology of conjoined twins in Latin America.
Acta Genet Med Gemellol (Roma)
May 1989
Institute of Cell Biology, La Plata, Argentina.
Twenty-three cases of symmetrical conjoined twins were registered by the Latin-American Collaborative Study of Congenital Malformations (ECLAMC) in 1,714,952 births, which were observed during the 1967-1986 period in 95 maternity hospitals distributed in eleven Latin-American countries. This results in a birth prevalence rate of about 1/75,000 births. The secular and geographic distribution of this material do not depart from random in spite of one hospital with three cases, and two hospitals with two cases each, within a short time period.
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