Synonyms: Late-onset infantile spasms
Cryptogenic late-onset epileptic spasms is a rare epilepsy syndrome characterized by late-onset (after 1 year old) epileptic spasms that ocurr in clusters associated with tonic seizures atypical absences and cognitive deterioration. Language difficulties and behavior problems are frequently present. EEG is characterized by a temporal or temporofrontal slow wave or spike focus combined with synchronous spike-waves and no hypsarrhythmia or background activity.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version April 2026
Newly diagnosed with
Cryptogenic late-onset epileptic spasms?
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Advocacy Organizations
Genetic Epilepsy Team Australia
Collaboration of research and care
Mickie?s Miracles
To help families get into Level IV Pediatric Epilepsy Centers for diagnosis and treatment urgently -- and provide support to families for every season of the pediatric epilepsy journey.
Rare Epilepsy Network (REN)
Improving outcomes of people with rare epilepsies through an innovative collaborative infrastructure that drives urgent, patient-centered research, educaiton and advocacy.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.