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A Case of Late Onset Type1 Narcolepsy Complicated by Sleep Apnea Syndrome in which Cataplexy Improved with CPAP
Hidemi Aritake1, Hiromasa Ogawa2, Yuta Kobayashi3
1Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Japan.
Abstract:
A 73-year-old woman experienced sudden drowsiness and sleep attacks for 10 years, as well as a loss of strength in her legs when laughing. Polysomnography (PSG) showed an apnea-hypopnea index (AHI) of 87.0, indicating severe obstructive sleep apnea (OSA). The Multiple Sleep Latency test showed three sleep-onset rapid eye movement periods, and symptoms of sleep attacks and cataplexy were observed, leading to a diagnosis of narcolepsy. After Continuous Positive Airway Pressure treatment, the AHI decreased to 21.0, and cataplexy occurred only once a month. Late-onset narcolepsy is a rare condition. We herein report a case of late-onset Type1 narcolepsy complicated by OSA.
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