ABSTRACT
Corpus callosum is the largest bundle of fibers connecting the left and right cerebral hemispheres. Its absence is called agenesis of corpus callosum (ACC) and can be total or partial. Delay in motor and cognitive functions, epilepsy, and social and language deficits are the most common symptoms reported in individuals with ACC. ACC can however be suspected by indirect signs such as absent cavum septum pellucidum, ventriculomegaly, and midline lesions including lipomas and cysts. Visualization of the corpus callosum on ultrasound requires additional views from the ones used for routine screening. Corpus callosum can usually be seen from 18 weeks in coronal and mid-sagittal views appearing as a thin anechoic space, bordered superiorly and inferiorly by echogenic lines. Visualization of the pericallosal artery in mid-sagittal view of the brain highlights the corpus callosum, running along the superior surface of the corpus callosum.
