Type:
Educational Exhibit
Keywords:
Ultrasound, Foetal imaging, CNS, Neuro, Diagnostic procedure, Congenital, Foetus, Retrospective, Diagnostic or prognostic study, Performed at one institution
Authors:
M. B. JADHAV1, A. Makam2, P. AGRAWAL 1, R. SANGHANI1, S. masudi1; 1BANGLORE /IN, 2Bangalore/IN
DOI:
10.26044/ecr2020/C-10702
Background
The corpus callosum represents largest commissure connecting the two cerebral hemispheres. It develops relatively late during cerebral ontogenesis, not assuming its definitive shape until 20 weeks of gestation, and continues to grow well after delivery. Therefore, a proper prenatal sonographic evaluation can be performed only after 20 weeks. The development starts from anterior and then continues posteriorly.
The prevalence of corpus callosum anomalies varies significantly in the different studies, depending on the population and the diagnostic criteria: it ranges from 0.3–0.7% in the general population to 2–3% in the developmentally disabled population.
It is often difficult to direct examine corpus callosum by using standard axial plane. It can be seen in the coronal plane, but is only demonstrated in its entire length by using mid-sagittal views, that represent the gold standard for diagnosing abnormalities of this structure.
Three-dimensional (3D) ultrasonography offers the potential of acquiring a volume of the fetal head in any position and then, by reconstructing the image using the multiplanar technique, of obtaining the appropriate view for examination of the corpus callosum.