Creutzfeldt-Jakob disease presenting with alien limb sign.

Creutzfeldt-Jakob disease is a fatal spongiform encephalopathy, which typically presents with a rapidly progressing dementia and additional neurological findings that can be quite variable and diverse. Here we report the unusual case of a patient who presented with left alien limb sign without overt cognitive impairment and was ultimately diagnosed with pathologically confirmed Creutzfeldt-Jakob disease. (c) 2006 Movement Disorder Society.