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.
Highlights
Conjoined twins (CTs) are a rare complication from monochorionic and monoamniotic twin pregnancies with an incidence ranging from 1:50,000 to 1:100,000 live births.[1]
We describe the use of 3D technologies, including 3D virtual and 3D physical models on prenatal evaluation of one parapagus CT
The exact number of fetal demises on the first half of pregnancy is unknown. This high rate of mortality is extended to the postnatal period: the common presence of cardiac malformations and new circumstances that this singular anatomy is exposed to after birth increases the risk of death of the CTs
Summary
Conjoined twins (CTs) are a rare complication from monochorionic and monoamniotic twin pregnancies with an incidence ranging from 1:50,000 to 1:100,000 live births.[1]. Of CTs deliveries, 46% are live born, 26% are stillborn, and 27% are terminated.[2] The exact number of fetal demises on the first half of pregnancy is unknown This high rate of mortality is extended to the postnatal period: the common presence of cardiac malformations and new circumstances that this singular anatomy is exposed to after birth increases the risk of death of the CTs. This high rate of mortality is extended to the postnatal period: the common presence of cardiac malformations and new circumstances that this singular anatomy is exposed to after birth increases the risk of death of the CTs This increases the risk of neonatal demise of one of the CT, requiring urgent surgical separation.[3] Recognizing anatomical singularities is crucial in the prenatal assessment and postnatal assistance of the CTs. For this, prenatal and postnatal imaging studies are fundamental. The neonatology team was informed of the lethal condition and only ventilatory support was offered
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