Female, 52 years old, with intermittent, stereotactic left upper extremity shaking movements sometimes with spread to the right upper extremity, and headache on the left side. No evidence of any structural abnormality or focal signal parenchymal signal alteration is seen. Diffusion-weighted images are within normal limits. There is no evidence of edema or mass effect. No findings to suggest acute or chronic intracranial hemorrhage are noted. There are no abnormal extra axial fluid collections. The ventricular system is normal in size and morphology. A partially empty sella is demonstrated. No pathologic parenchymal enhancement is seen. However, there is a 10 x 8 x 5 mm extra-axial dural-based enhancing lesion along the left petrous bone within the posterior fossa. This lesion perhaps minimally indents the adjacent parenchyma.
1.No definite findings are seen to account for the patient's symptoms.2.A small extra-axial mass is demonstrated along the petrous bone within the left posterior fossa which most likely represents a meningioma. Due to the small size of the lesion and the posterior fossa location, it is favored to be an incidental finding.3.A partially empty sella is seen which is nonspecific and can be a normal finding in patients of this age group. Partially empty sella can be associated with conditions of elevated intracranial pressure including idiopathic intracranial hypertension, though there are no other findings on this examination to support that diagnosis.