a young lady with features of dystonia and mild cognitive decline of about 2 yrs duration(ct shows cerebellar atrophy and a large cisterna magna) having acute encephalopathic features and seizures of 1 week duration.
counts are normal LP is unremarkable and rpt ct shows no fresh changes.
she has low grade fever but no definite localizing signs.
what could the reason for acute deterioration be.
what other tests could be done to identify the cause.