16-year-old male with history of hydrocephalus. Evaluate hydrocephalus. There is no evidence of intracranial hemorrhage, mass, or extra-axial fluid collection.There is moderate hydrocephalus involving the third ventricle and lateral ventricles bilaterally. There is no evidence of intracranial mass or other obstructive lesion. The cerebral aqueduct of Sylvius is patent. The fourth ventricle within normal limits. There is minimal effacement of the sulci in the parietal occipital lobes bilaterally. There is no midline shift. There are bilateral areas of low attenuation noted in the subcortical white matter of the posterior frontal lobes which are not consistent with transependymal exiting of CSF. These findings are nonspecific and clinical correlation with the patient's history and comparison with the prior CT examination is recommended. If no prior examinations are available, further evaluation with MRI could be considered.The calvaria and skull base are radiographically normal. The visualized mastoid air cells are normally pneumatized. There is extensive opacification of the left ethmoid air cells associated with minimal bony remodeling.
1.Moderate hydrocephalus involving the third ventricle and the lateral ventricles bilaterally without a definitive obstructing lesion or mass.2.Bilateral areas of low attenuation in the subcortical white matter of the posterior frontal lobes. These findings are nonspecific and clinical correlation with the patient's history and comparison with the prior CT examination is recommended. If no prior examinations are available, further evaluation with MRI could be considered.3.Opacification of the left ethmoid air cells associated with minimal bony remodeling. Clinical correlation is indicated and further evaluation with a dedicated CT sinus examination is recommended.