A positive enzyme-linked immunoelectrotransfer blot assay result for a patient without evidence of cysticercosis.

The enzyme-linked immunoelectrotransfer blot (EITB) has been considered diagnostic of cysticercosis when the results are positive. We describe a patient with a single band at 50 kDa on EITB and neuroimaging abnormalities suggestive of neurocysticercosis but no evidence of exposure to Taenium solium. Autopsy findings excluded neurocysticercosis. We suggest that a single band at 50 kDa on an EITB be considered an equivocal finding rather than diagnostic of cysticercosis.