Tehran University of Medical Sciences Case Reports in Clinical Practice 2538-2683 7 4 2023 01 07 187 189 Sahar Delavari Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran. Sogol Olamazadeh Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran. Nima Ameli Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran. Bahareh Pourghaz Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran. Abbas Tafakhori Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Neurology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran. 2021 10 23 2022 01 16 Lafora disease is a rare genetic disease caused by the accumulation of malformed glycogen products in the tissues. The disease usually manifests with idiopathic generalized tonic colonic seizures with poor response to antiepileptic drugs (AEDs). We report the case of a 19-year-old girl with the chief complaint of generalized refractory seizures, jerky movement, and cognitive deterioration with a positive history of epilepsy in her younger brother. The disease onset was at the age of 16 with jerky movement and blurred vision. She was admitted to our ward to have a long-term video EEG monitoring for further evaluation. Clinical presentation accompanied with abnormal EEG characteristics for Lafora disease, and the positive familial history were highly suggestive of Lafora disease. The disease was confirmed with genetic testing by which the mutation of EPM2A was detected. https://crcp.tums.ac.ir/index.php/crcp/article/view/609