Three-dimensional ultrasound for prenatal assessment of conjoined twins: additional advantages?

2017 ◽  
Vol 45 (6) ◽  
Author(s):  
Tuangsit Wataganara ◽  
Pornpimol Ruangvutilert ◽  
Prasert Sunsaneevithayakul ◽  
Kusol Russameecharoen ◽  
Katika Nawapun ◽  
...  
Keyword(s):  
Prenatal Diagnosis ◽  
Case Reports ◽  
Color Doppler ◽  
Transvaginal Ultrasound ◽  
Three Dimensional ◽  
Monozygotic Twins ◽  
Conjoined Twins ◽  
Additional Information ◽  
Perinatal Management ◽  
Magnetic Resonance Imaging Mri

AbstractConjoined twins are a rare, but serious, complication of monozygotic twins. Early prenatal diagnosis of conjoined twins is increasingly made with transvaginal ultrasound and color Doppler studies. Most prenatally diagnosed conjoined twins are terminated due to the high perinatal mortality, but advancement in pediatric surgery has allowed for successful postnatal separation in a small number of cases, and some parents may consider this option over termination of pregnancy. It is important to get a detailed prenatal ultrasound for the site and extent of fusion for an accurate categorization. Three-dimensional ultrasound (3DUS) provides images that can facilitate counselling for the parents. Additional information that impacts on diagnosis, prognostication, and perinatal management of conjoined twins could be obtained from selective use of 3DUS, particularly those with atypical fetal union. Most of the proposed additional benefits of 3DUS are based on case reports. Magnetic resonance imaging (MRI) has been increasingly used for the purpose of identifying intricate organ sharing. Because of the rarity of this condition, and the heterogeneity of fetal fusion, added benefits of either 3DUS or MRI for prenatal diagnosis and perinatal management of conjoined twins have not been demonstrated by well-conducted clinical trials. This article aims to review clinical application of various 3DUS display modes in prenatal assessment of conjoined twins, focusing on their potential additional benefits, risks and misuses. 3DUS may help detecting additional findings that are not possible with 2DUS, but, it has not been scientifically shown to improve the survival rate of the twins or reduce maternal morbidity.

scholarly journals P26.17: Three-dimensional sonography of conjoined twins at the 11-14 scan-four case reports

2009 ◽  
Vol 34 (S1) ◽  
pp. 281-281
Author(s):  
L. C. Bussamra ◽  
M. Barbosa ◽  
F. Andrade ◽  
G. Tedesco ◽  
I. Schwach ◽  
...  
Keyword(s):  
Case Reports ◽  
Three Dimensional ◽  
Conjoined Twins

scholarly journals Craniosynostosis: prenatal diagnosis by 2D/3D ultrasound, magnetic resonance imaging and computed tomography.

2016 ◽  
Vol 18 (3) ◽  
pp. 378 ◽  
Author(s):  
Talita Micheletti Helfer ◽  
Alberto Borges Peixoto ◽  
Gabriele Tonni ◽  
Edward Araujo Júnior
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Prenatal Diagnosis ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
3D Ultrasound ◽  
Resonance Imaging ◽  
Perinatal Complications ◽  
Wide Range ◽  
Magnetic Resonance Imaging Mri

Craniosynostosis is defined as the process of premature fusion of one or more of the cranial sutures.  It is a common condition that occurs in about 1 to 2,000 live births. Craniosynostosis may be classified in primary or secondary. It is also classified as nonsyndromic or syndromic. According to suture commitment, craniosynostosis may affect a single suture or multiple sutures. There is a wide range of syndromes involving craniosynostosis and the most common are Apert, Pffeifer, Crouzon, Shaethre-Chotzen and Muenke syndromes. The underlying etiology of nonsyndromic craniosynostosis is unknown. Mutations in the fibroblast growth factor (FGF) signalling pathway play a crucial role in the etiology of craniosynostosis syndromes. Prenatal ultrasound`s detection rate of craniosynostosis is low. Nowadays, different methods can be applied for prenatal diagnosis of craniosynostosis, such as two-dimensional (2D) and three-dimensional (3D) ultrasound, magnetic resonance imaging (MRI), computed tomography (CT) scan and, finally, molecular diagnosis. The presence of craniosynostosis may affect the birthing process. Fetuses with craniosynostosis also have higher rates of perinatal complications. In order to avoid the risks of untreated craniosynostosis, children are usually treated surgically soon after postnatal diagnosis.

scholarly journals Real-Life Diagnostic Accuracy of MRI in Prenatal Diagnosis

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Manuel Recio Rodríguez ◽  
Cristina Andreu-Vázquez ◽  
Israel J. Thuissard-Vasallo ◽  
Raquel Cano Alonso ◽  
Carmina Bermejo López ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Prenatal Diagnosis ◽  
Diagnostic Accuracy ◽  
Fetal Mri ◽  
Accurate Diagnosis ◽  
Fetal Ultrasound ◽  
Additional Information ◽  
Perinatal Management ◽  
Cns Pathology

There is some controversy about the value of fetal MRI in prenatal diagnosis, and most of the studies examine its accuracy in central nervous system (CNS) pathology. The objective of this retrospective study was to assess the diagnostic accuracy and usefulness of fetal MRI in the prenatal diagnosis of central nervous system (CNS) pathology and non-CNS pathology. Patients referred to the Radiology Department between 2007 and 2018 for a fetal MRI after detection of an anomaly in the fetal ultrasound, a high-risk pregnancy, or an inconclusive fetal ultrasound (n = 623) were included in the study. Postnatal diagnosis was used to assess the diagnostic accuracy of MRI. Fetal MRI was considered to provide additional information over fetal ultrasound when findings of the fetal MRI were not detected in the fetal ultrasound or when established a pathological condition that was not detected in the fetal ultrasound. Fetal MRI provided useful information for the perinatal management and prognosis over fetal ultrasound when findings of the fetal MRI changed the postnatal prognosis, leaded to the decision to legally terminate the pregnancy, changed prenatal or postnatal follow-up, or helped in the planning of prenatal or postnatal treatment. Fetal MRI offered an accurate diagnosis in 97% of cases (compared to 90.4% of fetal ultrasound; p < 0.001 ). Concordance between fetal ultrasound and fetal MRI was 92.1%. Fetal MRI provided additional information over fetal ultrasound in 23.1% of cases. In 11.6% of cases, the information was useful for the perinatal management and prognosis. In 45 cases (7.2%), fetal MRI was the only accurate diagnosis. In conclusion, fetal MRI has a superior diagnostic accuracy, especially in CNS pathology, and provides additional useful information in CNS, thoracic, and abdominal pathology.

Additional benefits of three-dimensional ultrasound for prenatal assessment of twins

2020 ◽  
Vol 48 (2) ◽  
pp. 102-114 ◽  
Author(s):  
Tuangsit Wataganara ◽  
Piengbulan Yapan ◽  
Sakita Moungmaithong ◽  
Nalat Sompagdee ◽  
Nisarat Phithakwatchara ◽  
...  
Keyword(s):  
Power Doppler ◽  
Three Dimensional ◽  
Nuchal Translucency ◽  
Conjoined Twins ◽  
Ultrasound Measurement ◽  
Additional Advantage ◽  
Additional Information ◽  
Volumetric Assessment ◽  
Conventional Ultrasound ◽  
Twin Pregnancies

AbstractThree-dimensional ultrasound (3DUS) may provide additional information for prenatal assessment of twins. It may improve the diagnostic confidence of dating, nuchal translucency (NT) and chorionicity assignment in twin pregnancies. The “virtual 3DUS placentoscopy” can guide selective fetoscopic laser photocoagulation (SFLP) to treat twin-twin transfusion syndrome (TTTS). Volumetric assessment of the dysmorphic acardiac twin with the Virtual Organ Computer-aided Analysis (VOCAL) software is more accurate than the conventional ultrasound measurement. Twin anemia polycythemia (TAP) sequence and selective intrauterine growth restriction (sIUGR) may be clinically monitored with 3DUS placental volume (PV) and power Doppler vascular indices. Congenital anomalies are more common in twins. Evaluation of fetal anomalies with 3DUS could assist perinatal management. The 3DUS power Doppler can provide a better understanding of true and false umbilical cord knots, which are commonly found in monoamniotic (MA) twins. Single demise in monochorionic (MC) twin pregnancies can cause severe neurologic morbidity in the surviving co-twin. Prenatal prediction of brain injury in the surviving co-twin with unremarkable neurosonographic examination is difficult. The 3DUS power Doppler may aid in prenatal detection of subtle abnormal cerebral perfusion. Prenatal assessment of conjoined twins with 3DUS is important if emergency postnatal surgical separation is anticipated. There is no significant additional advantage in using real-time 3DUS to guide prenatal interventions. Assessment of the cervix and pelvic floor during twin pregnancies is enhanced with 3DUS. Due to lack of high-quality studies, routine prenatal 3DUS in twin pregnancies needs to be balanced with risks of excessive ultrasound exposure.

scholarly journals Prenatal Diagnosis and Postnatal Findings of Cephalothoracopagus Janiceps Disymmetros: A Case Report

2012 ◽  
Vol 2012 ◽  
pp. 1-3 ◽  
Author(s):  
Lívia Teresa Moreira Rios ◽  
Edward Araujo Júnior ◽  
Luciano Marcondes Machado Nardozza ◽  
Daniela Cristina Nacaratto ◽  
Antonio Fernandes Moron ◽  
...  
Keyword(s):  
Case Report ◽  
Prenatal Diagnosis ◽  
Twin Pregnancy ◽  
Rare Variants ◽  
Monozygotic Twins ◽  
Conjoined Twins ◽  
Incidence Rates ◽  
Typical Case ◽  
Embryonic Disk

Conjoined twins are rare variants of monozygotic twins, which result from an incomplete division of the embryonic disk. Cephalothoracopagus is a rare twin pregnancy described as imperfect fusion of the head and chest, but separated columns, limbs, and pelvis. They occur with incidence rates that range from 1 per 50,000 to 1 per 100,000 births; however, the incidence of the cephalothoracopagus variety is 1 per 58 conjoined twins. In the case of identical and symmetric faces caused by the orientations of the 2 notochordal axes that are perfectly ventroventral, they are called janiceps disymmetros. We present a prenatal diagnosis of a typical case of cephalothoracopagus janiceps disymmetros and the diagnostic confirmation by image and pathology exams.

scholarly journals Prenatal diagnosis of parasitic conjoined twins with three-dimensional ultrasound

2013 ◽  
Vol 53 (3) ◽  
pp. 131-133 ◽  
Author(s):  
Miyuki Terata ◽  
Akihiko Kikuchi ◽  
Tomonobu Kanasugi ◽  
Rie Oyama ◽  
Akimune Fukushima ◽  
...  
Keyword(s):  
Prenatal Diagnosis ◽  
Three Dimensional ◽  
Conjoined Twins

scholarly journals P09.02: Three-dimensional sonography of conjoined twins at 12 weeks-three case reports

2006 ◽  
Vol 28 (4) ◽  
pp. 576-576
Author(s):  
L. C. S. Bussamra ◽  
E. Cordioli ◽  
C. G. V. Murta ◽  
C. R. Pires ◽  
A. F. Moron
Keyword(s):  
Case Reports ◽  
Three Dimensional ◽  
Conjoined Twins
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