 cytology and cultures were negative. HIV 1 titer was negative. Urine drug screen, negative. A stereotactic brain biopsy of the right parieto-occipital region was consistent with demyelinating disease. She was treated with Decadron 6mg IV qhours and Cytoxan 0.75gm/m2 (1.25gm). On 12/3/92, she has a focal motor seizure with rhythmic jerking of the LUE