Spinal cord tumor of unknown etiology. Brain parenchyma is normal in attenuation and morphology. The ventricles are symmetric and normal in volume. No abnormal enhancing lesions are seen in the brain parenchyma. Focal enhancing mass is seen at the level of the foramen magnum which measures 2.8 x 2.1 cm transaxially (image 2 of series 7) x 3.1 cm sagittally (image 41 series 80273). The mass enhances homogeneously and appears extramedullary in location. It is unclear if the mass is extradural or intradural in origin. There is no evidence of associated bony destruction or remodeling. Few foci of high density are seen within the mass consistent with calcification. The upper cervical spinal cord is displaced posteriorly and laterally along the right aspect of the canal. No additional enhancing lesions are seen in the spinal canal. Differential considerations include a meningioma and a hemangiopericytoma. Findings can further evaluated with cervical spine MRI.The visceral and vascular structures of the neck are normal. No pathologic lymphadenopathy or abnormal enhancing masses are seen in the soft tissues of the neck. Airway is widely patent. Visualized osseous structures demonstrate degenerative changes without other abnormality. Visualized lung apices are unremarkable.
Enhancing mass at the foramen magnum which appears extramedullary in location and causes mass effect on the spinal cord. Differential considerations include meningioma and hemangiopericytoma.