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CC BY 4.0 · Rev Bras Ginecol Obstet 2021; 43(12): 985-987
DOI: 10.1055/s-0041-1739297
Case Report

Antenatal Diagnosis of Parapagus Conjoined Twins: 3D Virtual and 3D Physical Models

Diagnóstico antenatal de gêmeos unidos parapagus: Modelos 3D virtuais e físicos
Pedro Castro 
1   Department of Fetal Medicine, Clínica de Diagnóstico por Imagem, Rio de Janeiro, RJ, Brazil
,
Heron Werner 
1   Department of Fetal Medicine, Clínica de Diagnóstico por Imagem, Rio de Janeiro, RJ, Brazil
,
Ana Paula Matos 
1   Department of Fetal Medicine, Clínica de Diagnóstico por Imagem, Rio de Janeiro, RJ, Brazil
,
Gerson Ribeiro 
1   Department of Fetal Medicine, Clínica de Diagnóstico por Imagem, Rio de Janeiro, RJ, Brazil
2   Department of Arts and Design, Pontifícia Universidade Católica, Rio de Janeiro, RJ, Brazil
,
Jorge Lopes 
2   Department of Arts and Design, Pontifícia Universidade Católica, Rio de Janeiro, RJ, Brazil
,
Edward Araujo  Júnior
3   Department of Obstetrics, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
4   Medical course, Universidade Municipal de São Caetano do Sul, Campus Bela Vista, São Paulo, SP, Brazil
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Abstract

Conjoined twins (CTs) are a rare complication from monochorionic and monoamniotic twin pregnancies. We describe the use of 3D technologies, including 3D virtual and 3D physical models on prenatal evaluation of one parapagus CT. A 16-year-old G1P0 woman was referred for fetal magnetic resonance imaging (MRI) anatomical evaluation of a CT at 28 weeks of gestation. 3D images of the fetal surface were generated by the software during the examination for spatial comprehension of the relationship between the fetal parts. The pair of CTs died at the 32nd week of gestation, a few hours after cesarean section. 3D technologies are an important tool for parental counseling and preparation of the multidisciplinary care team for delivery and neonatal assistance and possible surgical planning for postnatal separation in CTs cases.

Resumo

Gêmeos unidos (GUs) são uma complicação rara de gestações gemelares monocoriônicas e monoamnióticas. Descrevemos o uso de tecnologias 3D, incluindo modelos 3D virtuais e físicos, na avaliação pré-natal de GU parapagus. Mulher de 16 anos, G1P0, foi encaminhada para avaliação anatômica por ressonância magnética (RM) fetal de GU com 28 semanas de gestação. Imagens 3D da superfície fetal foram geradas pelo software durante o exame para compreensão espacial da relação entre as partes fetais. O par de GUs morreu na 32ª semana de gestação, poucas horas após a cesariana. As tecnologias 3D são uma importante ferramenta de aconselhamento dos pais e de preparação da equipe multiprofissional para o parto e a assistência neonatal, além de possível planejamento cirúrgico para separação pós-natal em casos de GUs.

Keywords

conjoined twins - magnetic resonance imaging - three-dimensional models

Palavras-chave

gêmeos unidos - ressonância magnética - modelos tridimensionais


Publication History

Received: 29 November 2020

Accepted: 04 October 2021

Article published online:
21 December 2021

© 2021. Federação Brasileira de Ginecologia e Obstetrícia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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