Partial resection of a schwannoma at T8-T9 level in 2004, in addition to a possible lesion in the upper thoracic spine and in midbrain adjacent to the aqueductal area. Brain: There is a non-enhancing 7 mm diameter lesion with thin peripheral high T2 signal and central intermediate T2 signal in the right posterior midbrain periaqueductal region. There is no evidence of intracranial hemorrhage or acute infarct. There is a partially empty sella. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.Cervical Spine: There is no evidence of tumor within the cervical spine. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. There is no significant spinal canal stenosis. The spinal cord displays normal signal and morphology. The paravertebral soft tissues are unremarkable.Thoracic Spine: There are postoperative findings in the lower thoracic spine. There is a lobulated, enhancing right posterolateral extramedullary intradural mass that spans the T9 to T12 levels, which measures up to 9 mm in thickness, with associated marked spinal cord compression and a small posterior midline defect in the spinal cord inferiorly. There is no evidence of tumor within the rest of the thoracic spine. There is focal kyphosis and convex left scoliosis centered at T11-12 with mild anterior wedging of the T11 and T12 vertebral bodies, but no spondylolisthesis. The vertebral bone marrow signal is unremarkable. There is no significant spinal canal stenosis.
1. A subcentimeter tumor in the right periaqueductal region may represent a low grade glioma, for example.2. Tumor in the spinal canal that spans the T9 to T12 levels with marked compression of the spinal cord corresponds to the reported residual schwannoma. 3. No discernible finding that corresponds to the reported possibility of tumor at the T2 level.4. Nonspecific partially empty sella. 