 B12 were all normal. MRI C-spine, 7/145/93, showed an area of decreased T1 and increased T2 signal at the C4-6 levels within the right lateral spinal cord. The lesion appeared intramedullary and eccentric, and peripherally enhanced with gadolinium. Lumbar puncture, 7/16/93, revealed the following CSF analysis results: RBC 0, WBC 1 (lymphocyte)