Rare Case of Myoclonic Status Epilepticus

Introduction: Subacute sclerosing panencephalitis (SSPE) is a rare, progressive, and fatal neurodegenerative disorder caused by persistent mutant measles virus infection. It typically presents years after primary measles infection with cognitive decline, behavioral changes, and myoclonic jerks. Case Presentation: An 8-year-old male child presented with a history of involuntary movements involving bilateral limbs and truncal musculature for 2 months. Episodes were brief, multiple, lasted a few milliseconds, and were preceded by a viral prodrome. The patient’s attendants also reported delayed developmental milestones Detailed nutritional and vaccination history was obtained, which revealed a history of missed measles vaccination. There was no associated history of constitutional symptoms such as fever or weight loss, autonomic dysfunction, and pyramidal symptoms. Cerebellar and sensory system examinations were also normal. In view of the clinical presentation, the patient was initially evaluated for metabolic and endocrine ethologies, which were found to be normal and were systematically excluded. Subsequently, electrophysiological evaluation with electroencephalography was performed, which demonstrated bilateral periodic discharges, raising suspicion for viral prodrome preceding chronic systemic Correlating the clinical history with the semiology of characteristic myoclonic jerks, missed measles vaccination, and supportive electrophysiological findings favor the suspicion of diagnosis of SSPE. Cerebrospinal fluid analysis for measles antibodies was advised and reports are awaited. Patient was initiated on polytherapy of antiepileptics, following which patient showed slight reduction in myoclonic jerks. Regular follow-up was advised for progression of symptoms or emergence of new neurological deficits Conclusion: This case highlights the importance of vaccination history. Furthermore, this case emphasizes the diagnostic significance of correlating clinical semiology with electrophysiological findings in children presenting with myoclonic jerks. Publication History Article published online: 15 July 2026 © 2026. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/) Thieme Medical and Scientific Publishers Private Limited A-13A, Graphix Tower 1, 6th floor, Sector 62, Noida 201309, Uttar Pradesh, India