Ultrasound diagnosis: Absence of the septum cavum pellucidum and tear-drop appearance of dilated posterior part of the lateral ventricles (‘tear drop’) in the standard transverse view of the brain at >18 weeks’ gestation. Complete or partial (usually of the posterior part) absence of the corpus callosum in a mid-sagittal view of the brain.

2025年2月7日 · Dysgenesis of the corpus callosum may be complete (agenesis) or partial (dysgenesis) and represents an in utero developmental anomaly. It can be divided into: primary agenesis: corpus callosum never forms. secondary dysgenesis: corpus callosum forms normally and is subsequently destroyed

Normal corpus callosum, pericallosal (PC) and callosomarginal (CM)arteries. Agenesis of the corpus callosum with a "sunburst" gyral pattern and non visualization of the pericallosal or callosomarginal arteries

2012年10月1日 · The corpus callosum (CC) can be assessed on ultrasound by direct visualization, but indirect features, such as ventriculomegaly, absence of the cavum septi pellucidi or widening of interhemispheric fissure, are often the reason for …

2013年5月13日 · Direct ultrasound diagnosis of ACC is made on the midsagittal view of the fetal head 1. However, suspicion of such malformation is usually raised at the midtrimester anomaly scan on the basis of an abnormal transventricular view, due to colpocephaly, absent cavum septi pellucidi and/or ventricular dilatation.

The nonvisualization of cavum septum pellucidum or dysmorphic cavum septum pellucidum in axial view are indirect signs for beginners to diagnose complete agenesis of corpus callosum (cACC) and partial agenesis of the corpus callosum (pACC).

Standardized investigation included a detailed fetal ultrasound including neurosonogram, fetal karyotyping (standard karyotype or array comparative genomic hybridization) and fetal magnetic resonance imaging.

The antenatal diagnosis of complete CC agenesis is easy after mid-trimester by ultrasound (US) even in the axial plane. The non-visualization of cavum septum pellucidum and colpocephaly are critical signs in the axial view.

Objectives: To assess the presence and degree of indirect signs of agenesis of the corpus callosum (ACC) according to gestational age and determine the percentage of cases in which each sign is present by 24 gestational weeks.

2025年1月20日 · Anomalies of the corpus callosum (CC) are amongst the most common fetal Central Nervous System (CNS) anomalies detectable on ultrasound. Underlying genetic disease plays an important part in defining prognosis.