72-year-old male has intracranial mass with possible NPH. Memory difficulty and gait instability. Evaluate ventricular system and lesion if possible and Large extra-axial mass at the level of the left petroclinoid ligament, left cerebellopontine and prepontine cistern lesion consistent with a meningioma is redemonstrated. The lesion appears to extend into the left cavernous sinus. The density and size of lesion remains is stable since prior exam. Mass-effect on the pons is identical to prior study. Minimal difference in the appearance of tumor can be explained based on the slice angulation and positioning. Further evaluation with an MRI is recommended. No evidence of parenchymal edema adjacent to the tumor is identified. Images through posterior fossa demonstrate slight prominence of the lateral ventricles with no definitive interval change since prior exam.
1.Redemonstration of left petroclinoid ligament meningioma with no definitive evidence of change. Further evaluation with an MRI would be significantly more sensitive.2.Stable CT examination of brain with prominence of the supratentorial ventricular system.