Non-convulsive Seizures Mimicking Creutzfeldt-Jakob Disease with Rapid Resolution and Recurrence of MRI Abnormalities.

An 88-year-old man presented with acute altered mental status. Brain magnetic resonance imaging (MRI) demonstrated "cortical ribboning," which is classically associated with Creutzfeldt-Jakob disease. His rapid clinical improvement prompted a follow-up MRI three days after presentation, which showed resolution of the acute abnormal signals. The patient was eventually diagnosed with non-convulsive seizure. Five months later, he returned with a similar clinical presentation and MRI findings after self-discontinuation of anticonvulsant. It is important for clinicians to be aware that neurological changes associated with non-convulsive seizures can acutely mimic Creutzfeldt-Jakob disease, and to consider a short interval follow-up MRI for diagnostic challenges in acute settings.