Agenesis of the corpus callosum


Ventricular dilatation on cranial ultrasound.

Patient Data

Age: 22 days
Gender: Male

Hypoplasia of the cerebellar vermis with communication of the fourth ventricle with the magna cistern. The fourth ventricle is dilated.

Ascent of the third ventricle with dilation and parallelization of the lateral ventricles. Note communication between the third ventricle and the interhemispheric fissure.

Dilation of the occipital horns of the lateral ventricles (colpocephaly) is also visualized.

This is a case of agenesis of the corpus callosum.

Case Discussion

This is a case of agenesis of the corpus callosum characterized by its complete absence of idiopathic or multifactorial cause. It is associated with separation with dilatation and parallelization of the lateral ventricles with elevation of the third ventricle, giving the characteristic moose sign.

Associated cerebellar developmental anomaly with the absence of the vermis that determines communication between the cisterna magna and the fourth ventricle is observed.

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