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
Findings and procedure details
Most of the images were obtained by standard transabdominal approach only however, in vertex fetal presentation, a transvaginal scan with a high-frequency transducer provides better resolution.
2D Dimensional approaches for visualization of corpus callosum are fetal profile approach and Coronal approach.
Addition of colour Doppler helps in delineation of normal course of pericallosal artery which highlights the corpus callosum. The abnormal course pericallosal artery means that it repeats the contour of the preserved parts of the corpus callosum and rises upwards at the level of the missing corpus callosum.
Normograms of fetal CC dimensions have been published and can be used to assess normal and deviant development.
Various indirect signs of corpus callosum agenesis of are tear drop configuration of lateral ventricle due to dilatation of atria and occipital horn, three line complex mid line echo, absence of the cavum septi pellucid or widening of the interhemispheric fissure and upward displacement of third ventricle.
3D images of corpus callosum are obtained using multiplanar reconstruction techniques like VCI (Volume Contrast Imaging) mode which allows obtaining a thicker section and Omni View technology helps to get images according to a specialist assigned direction.
Agenesis of corpus callosum is often associated with other cerebral and/or extra cerebral malformations including number of aneuploidy and non-aneuploidy syndromes.