Objectives: The present study explored the clinical characteristics and prognostic factors of epilepsy in patients with mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS).Methods: Thirty-four MELAS patients were included in the present study. They were diagnosed by clinical characteristics, genetic testing, muscle biopsy, and retrospective analysis of other clinical data. The patients were divided into three groups according to the effects of treatment after at least 2 years of follow-up.Results: Epilepsy was more common in male MELAS patients than in females (20/14). The age of onset ranged from 0.5 to 57 years, with an average of 22.6 years. Patients with epilepsy and MELAS had various forms of seizures. Focal seizures were the most common type affecting 58.82% of patients, and some patients had multiple types of seizures. The abnormal EEG waves were mainly concentrated in the occipital (69.57%), frontal (65.22%) and temporal lobes (47.83%). Overall, the prognosis of patients with epilepsy and MELAS was poor. Poor prognosis was associated with brain atrophy (P = 0.026), status epilepticus (P < 0.001), and use of anti-seizure medications with high mitochondrial toxicity (P = 0.015).Interpretation: Avoiding the application of anti-seizure medications with high mitochondrial toxicity, controlling seizures more actively and effectively, and delaying the occurrence and progression of brain atrophy as much as possible are particularly important to improve the prognosis of patients with MELAS and epilepsy.

Anti-seizure medicines constitute a common yet important modality to treat epilepsy. However, some of them are associated with serious side effects including hepatotoxicity and hypersensitivity. Furthermore, the blood-brain barrier (BBB)...

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Cerebral venous sinus thrombosis (CVST) and subdural hematoma (SDH) are extremely rare in patients with systemic lupus erythematosus (SLE), and when conditions are severe, it can endanger the life of the patients. We report a case of a 44-year-old woman who was admitted to our hospital due to multiple paroxysmal headaches, dizziness, and seizures for 20 days. In the past 2 years, she had severe thrombocytopenia. Her brain computed tomography (CT) and magnetic resonance venography (MRV) demonstrated CVST and a SDH near the right parietal occipital lobe and left temporal parietal lobe.After admission, she was eventually diagnosed with SLE based on the seizures, thrombocytopenia, positive antinuclear antibodies, and anti-ds DNA antibodies. After treatment, the patient's headaches and symptoms completely disappeared, and the myodynamia of the left limbs improved to grade 4. Her platelet count rose to 199×10 9 /L. The second brain MRV and MRI demonstrated partial reopening of the right superior sagittal sinus, transverse sinus, and sigmoid sinus, and the improvement of bilaterally SDH, which revealed that the treatment with an anticoagulant, pulse methylprednisolone therapy, and intravenous gamma globulin was effective. We summarized possible mechanisms in this case, which can improve our understanding of CVST and SDH in SLE. And we consider that such patients should be treated as soon as possible, and the outcome can be good.