Anterior and posterior complexes: a step towards improving neurosonographic screening of midline and cortical anomalies

Viñals, Fernando Nuez; Correa, F.; Gonçalves-Pereira, P.M.

doi:10.1002/uog.14735

Cited by 25 publications

(52 citation statements)

References 24 publications

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“…The increased incidence of ventriculomegaly late in gestation also explains why corpus callosum defects are often diagnosed late 15 (as also evidenced by the mean gestational age at referral of 26 weeks in our study) and emphasizes the need to look for other clues for the diagnosis at the time of screening US, including the presence of the cavum septi pellucidi and the anterior complex ( Figure 4). 16,17 Alternatively, one could try to visualize the corpus callosum directly, [18][19][20] as this is now feasible in most cases, thanks to improvements in the quality of US equipment and the availability of high-quality 3-dimensional US on most machines. 21,22 An additional benefit of direct visualization of the corpus callosum would be the increased detection of hypoplasia and dysplasia of the corpus callosum, since these conditions are not always associated with absence of the cavum septi pellucidi.…”

Section: Discussionmentioning

confidence: 99%

Natural History of Ventriculomegaly in Fetal Agenesis of the Corpus Callosum

Masmejan

Blasér

Keunen

et al. 2019

J of Ultrasound Medicine

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Objectives To assess the natural evolution of the size of the fetal lateral ventricles throughout pregnancy in fetuses with callosal anomalies. Methods Cases of fetal callosal anomalies were retrospectively classified as isolated or complex based on the presence of other structural or genetic anomalies. Longitudinal ultrasound studies were reviewed, and postnatal outcomes were retrieved for isolated cases. Results In 135 fetuses, those who first presented after 24 weeks’ gestation were more likely to have ventriculomegaly (n = 58 of 68 [85%]) than those who presented before 24 weeks (n = 39 of 67 [58%]; P < .001). In 79 cases that had longitudinal follow‐up, the mean increase in ventricular width was 0.6 mm/wk, without a significant difference between isolated and complex cases (mean ± SD, 0.6 ± 1.5 versus 0.6 ± 1.1 mm; P = .45). Conclusions Callosal anomalies are associated with progressive ventriculomegaly on prenatal ultrasound imaging, without a difference between isolated and complex anomalies. This feature should be considered part of the disease spectrum. The consequence of progressive ventriculomegaly on the long‐term neurodevelopmental outcome is still unknown, and further studies should be aimed at obtaining long‐term follow‐up of these cases.

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Section: Discussionmentioning

confidence: 99%

Natural History of Ventriculomegaly in Fetal Agenesis of the Corpus Callosum

Masmejan

Blasér

Keunen

et al. 2019

J of Ultrasound Medicine

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“…Visualization of the CSP is fundamental to assess the integrity of CC, which cannot be identifies on axial views of the brain but require acquisition of sagittal and coronal planes. Recently, ultrasound assessment of the anterior complex, defined as the group of all the anatomical structures visible in a routine trans-ventricular plane of the fetal brain, has been proposed to improve the detection rate of supra-tentorial midline anomalies 6 .…”

Section: Assessment Of Supratentorial Midline Structures In the Fetusmentioning

confidence: 99%

Fetal midline anomalies: Diagnosis and counselling Part 1: Corpus callosum anomalies

Leombroni

Khalil

Liberati

et al. 2018

European Journal of Paediatric Neurology

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Prosencephalic development is characterized by three sequential events: prosencephalic formation (at the rostral end of the neural tube), cleavage and midline development 1-2. In particular, during prosencephalic cleavage, three main splitting events occurs: horizontal, to form the paired optic vescicles, olfactory bulbs and tracts, transverse, in which telencephalon separates from diecephalon and sagittal, to form the cerebral hemispheres, lateral ventricles and basal ganglia. Prosencephalic development is characterized by appearance of three plates of tissue: the commissural, the chiasmatic and the hypothalamic plates. These structures are fundamental in the development of the corpus callosum (CC), cavum septum pellucidi (CSP), optic nerve chiasm and hypothalamic

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“…Evaluation of the 20 individual cases of pACC showed 11 fetuses with an apparently normal brain, although with a suspected abnormal CSP and anterior complex, as described by the groups of Guibaud and Vinals. In the remaining nine cases, there were associated central nervous system (CNS) findings, some in combination, which included colpocephaly ( n = 5), lissencephaly ( n = 2), ventriculomegaly ≥ 10 mm ( n = 2) and an interhemispheric cyst ( n = 1).…”

Section: Resultsmentioning

confidence: 92%

Cavum septi pellucidi (CSP) ratio: a marker for partial agenesis of the fetal corpus callosum

Karl

Esser²,

Heling³

et al. 2017

Ultrasound in Obstet & Gyne

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Anterior and posterior complexes: a step towards improving neurosonographic screening of midline and cortical anomalies

Abstract: Objective To describe the anatomical structures that form the anterior (AC) and posterior (PC) complexes of the fetal brain and to categorize their anomalies in fetuses with cerebral abnormalities. Methods

Cited by 25 publications

References 24 publications

Natural History of Ventriculomegaly in Fetal Agenesis of the Corpus Callosum

Natural History of Ventriculomegaly in Fetal Agenesis of the Corpus Callosum

Fetal midline anomalies: Diagnosis and counselling Part 1: Corpus callosum anomalies

Cavum septi pellucidi (CSP) ratio: a marker for partial agenesis of the fetal corpus callosum

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