“…Both neurosyphilis and tuberculosis, for example, could rarely manifest as enhancing longitudinally extensive lesion(s) causing progressive subacute symptoms. 9 , 10 However, an infectious etiology was less likely in this patient who had no infectious symptoms or identifiable exposures on presentation of her neurologic symptoms and had an extensive negative workup for infections, including negative screens for syphilis and HIV as well as negative CSF cultures, VDRL, and viral studies.…”