20 year-old male with history of neurofibromatosis type II status post resection 5 years ago complaining of headache and right leg weakness x 3 weeks. History of prior tumor in brain stem and cervical spinal cord. No mass effect, midline shift, edema, or areas of abnormal contrast enhancement are seen. Presence of contrast reduces sensitivity for intracranial hemorrhage. No gross intracranial hemorrhage is seen. The brainstem is poorly visualized -- if tumor recurrence is a clinical concern, recommend contrast-enhanced MRI.The ventricles and basal cisterns are normal in size and configuration.Within the limits of CT precision, the diameters of the internal auditory canals are unchanged from the study dated 7/9/2006. The known bilateral acoustic neuromas are not visible on the current study.The visualized paranasal sinuses and mastoid air cells are normally pneumatized.No bony lesions of the skull base are seen. A poorly defined sclerotic lesion is present in the frontal bone -- this finding appears stable from the scan dated 7/9/2006. Patient is status post occipital craniotomy.
1. No acute intracranial process. 2. Multiple abnormalities as detailed above.