LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY
This axial (cross sectional) CT image of the head in an infant shows marked dilatation of the fourth ventricle. This child had previously undergone ventricular shunting with the shunt catheter in the third ventricle. The fourth ventricle became sequestered from communication with the third and lateral ventricles due to obstruction at the aqueduct of sylvius and it also lost its connection with the extra-ventricular subarachnoid spaces due to obstruction of the outlet foramina of the fourth ventricle. As a result the fourth ventricle was excluded from the rest of the ventircular and subarachnoid spaces therefore becoming dilated. This is called a trapped fourth ventricle and often has to be treated by selectively shunting the fourth ventricle.
Model release not required. Property release not required.