[Unilateral ptosis induced by pure midbrain infarction: a case report].

We describe herein a case with left-side ptosis induced by pure midbrain infarction in a 49-year-old woman. She also presented with diplopia and right-side cerebellar ataxia. MRI demonstrated new ischemic stroke of the left ventral paramedian midbrain. In this case, ischemia of the left oculomotor fascicles caused the left-side ptosis and diplopia, and ischemia of the left decussation of the superior cerebellar peduncle caused the right-side cerebellar ataxia. These symptoms resulted from inner superior medial mesencephalic branch infraction. This case offers an educational example that can be explained by models proposed in the past and requires knowledge of neuroanatomy and cerebrovasculature.

[Non-Convulsive Status Epilepticus Caused by Hyponatremia in an Elderly Woman: A Case Report].

We report the case of a 67-year-old woman with non-convulsive status epilepticus (NCSE) due to hyponatremia. She had a history of psychogenic polydipsia but not epilepsy. She was admitted to our hospital with dysbulia. On admission, she was confused and disoriented (Glasgow Coma Scale: 6, E1V1M4). Magnetic resonance imaging of the brain showed no abnormalities. Laboratory test showed hyponatremia (Na+ level: 115 mEq/L). The electroencephalography (EEG) showed a generalized slow wave of 5 Hz during recording. The slow wave was promptly suppressed by diazepam and levetiracetam administered intravenously and orally, respectively. After the hyponatremia was treated the seizures stopped and did not reoccur, even after cessation of the anticonvulsant drugs. The patient was discharged with no neurological deficits. Few reports have described this condition. Here we discuss the diagnosis and treatment of NCSE due to hyponatremia. (Received May 31, 2016; Accepted December 12, 2016; Published April 1, 2017).