Dizziness: MRI for surgical planning of left brain lesion. There is an unchanged left frontal convexity arachnoid cyst that measures up to approximately 30 mm and compresses the underlying brain parenchyma. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable. There are skin-based fiducial markers in position.
Preoperative planning MRI demonstrates an unchanged left frontal convexity arachnoid cyst.