Two month old male with hydrocephalus seen on serial head ultrasounds from baseline CT. There is no evidence of intracranial hemorrhage, mass or edema. The lateral ventricles are markedly enlarged, most noted in the occipital horn of the left lateral ventricle, which contains an external drainage catheter. The third ventricle is mildly enlarged, and the fourth ventricle demonstrates normal volume. Ventricular volumes are grossly stable from recent ultrasound exams, given differences in imaging technique. The ventricles remain midline. The basal cisterns are normal in size and configuration. The myelination pattern is within normal limits. There is mild encephalomalacia left parietal lobe near the enlarged occipital horn of the left lateral ventricle.The calvaria and skull base are radiographically normal. The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
Stable hydrocephalus and associated left parietal encephalomalacia as described.