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Narcolepsy in prepubertal children
1Stanford Sleep Disorder Clinic, Stanford University Medical Center, CA 94305, USA.
Insights
Pediatric narcolepsy diagnosis is often delayed, with symptoms like cataplexy, sleep paralysis, and hallucinations. Early consideration of narcolepsy is crucial for children with behavioral and depressive symptoms.
Area of Science:
- Neurology
- Pediatric Sleep Medicine
Background:
- Narcolepsy is a chronic neurological disorder affecting sleep-wake regulation.
- Diagnosis in children is often delayed, leading to prolonged suffering and misdiagnosis.
Purpose of the Study:
- To investigate the diagnostic challenges and clinical features of narcolepsy in a pediatric cohort.
- To highlight the importance of considering narcolepsy in children presenting with specific symptoms.
Main Methods:
- Retrospective chart review of 51 children diagnosed with narcolepsy.
- Analysis of clinical symptoms, sleep study results (Multiple Sleep Latency Test), HLA typing, and treatment outcomes.
- Evaluation of diagnostic delays and family/teacher perceptions.
Main Results:
- A mean of three referrals preceded narcolepsy diagnosis.
- Common symptoms included cataplexy, sleep paralysis, and hypnagogic hallucinations.
- All children had abnormal Multiple Sleep Latency Test results, with a mean sleep latency of 1.5 minutes and multiple sleep-onset rapid eye movement periods.
- High prevalence of HLA-DQB1*06:02 (DQw6) and HLA-DRB1*15:01 (DRw15) positivity.
- All children exhibited depressive symptoms during follow-up.
Conclusions:
- Narcolepsy diagnosis in children is frequently delayed.
- Clinical presentation includes characteristic sleep-related symptoms and often co-occurs with depressive symptoms.
- Consideration of narcolepsy is vital for children with unexplained behavioral and mood disturbances.
Abstract:
Narcolepsy was diagnosed in 51 children (29 boys). The age range was 2.1 to 11.8 years (mean, 7.9 +/- 3.1 years). A mean of three referrals was made before narcolepsy was considered. In 10 children, cataplexy was the presenting symptom. Thirty-eight children acknowledged sleep paralysis and 30 acknowledged hypnagogic hallucinations. All children had sleep studies; 31 exhibited rapid eye movement at sleep onset. The mean sleep latency was 1.5 minutes +/- 39 seconds on the Multiple Sleep Latency Test. All children had at least two sleep-onset rapid eye movement sleep episodes in this test. Forty-six children were HLA class II-positive for DQw6, and 45 were also positive for DRw15. Thirty (65%) families refused referrals to support and counseling groups. Teachers often refused to acknowledge a medical problem. During follow-up, all children presented at least once with depressive symptoms in reaction to their syndrome. Narcolepsy should be considered when evaluating children with behavioral and depressive symptoms.
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