Reason: intracranial lesion on OSH imaging History: intracranial lesion on OSH imaging, p/w episode of syncope The CSF spaces are appropriate for the patient's stated age with no midline shift. There is a uniformly enhancing mass present along the anterior cranial fossa centered at the midline measuring 44 x 50 mm axial dimensions and 30 x 50 mm sagittal dimensions. It contains a few flow voids. It displaces the inferior aspects of the frontal lobes posteriorly. It displaces the corpus callosum and anterior cerebral arteries superiorly and posteriorly. Within the adjacent brain parenchyma there is no significant signal change. The mass extends into the olfactory grooves. The olfactory bulbs are not separately identified. There is a large vein which courses along the right aspect of the mass anteriorly and laterally.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact. The superior ophthalmic veins are large .
1.Large anterior fossa extracranial masses most likely represents a meningioma. 