Neurocysticercosis is endemic in most of the world, and it accounts for 2% of seizure cases in some areas of the United States.1 Extraparenchymal neurocysticercosis, discussed in the Case Record involving a patient with this disease (May 17 issue),2 is a slowly progressive disease that frequently involves the subarachnoid spinal space3 and can be fatal. It should be treated with surgery or antiparasitic agents until there are no remaining lesions.Although it is more sensitive than computed tomography, magnetic resonance imaging may not show all lesions. Monoclonal antibody–based antigen detection, briefly mentioned in the discussion of management . . .