A frontal horn cyst or connatal cyst is a
cystic
A cyst is a closed sac, having a distinct envelope and division compared with the nearby tissue. Hence, it is a cluster of cells that have grouped together to form a sac (like the manner in which water molecules group together to form a bubble); ...
area in the brain. They are sometimes found in newborn babies and do not appear to cause any developmental problems.
It is adjacent to the
superolateral margin of the body and
frontal horn of the lateral ventricles, and are believed to represent a normal variant with no effect on neurological development.
On
ultrasound
Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies ...
imaging, the outward most part of the ventricles has rounded appearance, giving the cystic appearance.
References
Cysts
{{anatomy-stub