Startle epilepsy complicating Down syndrome during adulthood

Area of Science:

• Neurology
• Genetics
• Epileptology

Background:

• Down syndrome (trisomy 21) is a genetic condition.
• Startle epilepsy is a rare reflex epilepsy.
• Epilepsy can occur in individuals with Down syndrome.

Observation:

• A 20-year-old woman with Down syndrome developed severe startle epilepsy and spontaneous seizures.
• Seizure characteristics and EEG findings resembled startle epilepsy in cerebral palsy patients.
• No focal brain lesion was identified near the motor supplementary cortex.

Findings:

• The patient's epilepsy presented similarly to other forms of startle epilepsy.
• The absence of a focal brain lesion in this case is noteworthy.
• Clonazepam therapy significantly decreased seizure frequency.

Implications:

• This case highlights a potential link between Down syndrome and startle epilepsy.
• Clonazepam may be an effective treatment for startle epilepsy in this population.
• Further research is needed to understand the underlying mechanisms.