Bilateral lower extremity weakness and decreased sensation. Brain: There is ill-defined T2 hyperintensity in the anterior pons, left greater than right, without significant mass effect. There is no evidence of intracranial hemorrhage, mass, or acute infarct. 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.Spine: The cervicothoracic spinal cord signal abnormality is less conspicuous. 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 paravertebral soft tissues are unremarkable.
1. Ill-defined T2 hyperintensity in the anterior pons may represent an inflammatory or demyelinating process, for example, but is incompletely characterized since intravenous contrast could not be administered.2. The cervicothoracic spinal cord signal abnormality is less conspicuous and may also represent an inflammatory or demyelinating process, but is incompletely characterized since intravenous contrast could not be administered.