Study Reveals Higher-Than-Expected Rates of Epilepsy in Frontotemporal Dementia Patients

A recent large-scale study has uncovered that epileptic seizures occur significantly more often in patients with frontotemporal dementia (FTD) than previously recognized. Coordinated by Neurocenter Finland and published in JAMA Neurology, the research sheds new light on the overlap between neurodegenerative conditions and electrical disturbances in the brain, offering vital insights for clinical monitoring and patient care.

Investigating the FTD and Epilepsy Connection

While epilepsy has long been associated with Alzheimer’s disease, less was understood regarding its exact relationship with FTD. To address this knowledge gap, researchers from the University of Eastern Finland and the University of Oulu examined extensive patient data gathered from the university hospitals of Kuopio and Oulu spanning from 2010 to 2021. Out of 12,490 medical records evaluated, the team identified 245 patients diagnosed with FTD, 1,326 patients with Alzheimer’s disease, and a comparison group of healthy controls.

According to doctoral researcher Annemari Kilpeläinen, a medical specialist in neurology and the study’s first author, the findings demonstrated that epilepsy is notably more common among individuals with FTD than among those with Alzheimer’s disease or healthy controls. Furthermore, investigators observed that epilepsy symptoms manifested in some FTD patients up to ten years prior to receiving their formal dementia diagnosis.

Timeline and Diagnostic Challenges

The research assessed the prevalence of epilepsy at multiple intervals, ranging from ten years before the dementia diagnosis to five years after. The data revealed that epilepsy prevalence among FTD patients increased progressively over time, with approximately 11% of patients experiencing epilepsy five years post-diagnosis. Researchers also noted that epilepsy-related medications were prescribed more frequently to FTD patients, reinforcing the reliability of the epidemiological findings.

Diagnosing epilepsy in this population can prove challenging because certain symptoms of FTD closely mimic epileptic seizures. This clinical overlap can contribute to underdiagnosis and subsequent treatment delays, which experts caution can worsen a patient’s overall condition. Recognizing these occurrences is critical, as appropriate treatment can help preserve functional capacity and improve quality of life.

Future Research Directions

Associate Professor Eino Solje, director of the UEF Brain Research Unit and principal investigator of the project, emphasized that these findings open new avenues for scientific inquiry. Specifically, researchers aim to explore whether FTD and epilepsy share underlying pathophysiological mechanisms and whether certain FTD symptoms stem from alterations in the brain’s specific electrical systems. The study highlights the value of interdisciplinary scientific collaboration and real-world health registries in advancing neurological care.

• Study analyzed medical records from 2010 to 2021 across two Finnish university hospitals.
• Epilepsy was identified in some FTD patients up to a decade before their dementia diagnosis.
• By five years post-diagnosis, approximately 11% of FTD patients had developed epilepsy.