[Cardioembolic stroke manifested by isolated tonic seizure of the left upper limb].

We reported a 61-year old man with cardioembolic stroke manifested by isolated tonic seizure of the left upper limb. He had a history of chronic atrial fibrillation and transient ischemic attack. He was brought to our hospital by ambulance, when he suddenly had isolated tonic seizure of left upper limb. On admission, he had no neurological symptoms and signs. Brain diffusion weighted MR image disclosed high intensity area in the right parietal lobe, although T2-weighted image did not show any abnormalities. On 8th day, a high intensity area was observed both on the diffusion-weighted and T2-weighted MR images. In case of isolated tonic seizure of left upper limb, careful examination of stroke is required especially if the patient had a high risk of stroke.