A case of obstructive sleep apnea syndrome (OSAS) with narcoleptic features is described; polysomnographic studies were carried out and revealed a severe nocturnal respiratory impairment due to apneic episodes. A multiple sleep latency test (MSLT) showed early REM sleep onset in two out of five series. Nasal CPAP utilization improved the quality of nocturnal sleep and reverted all narcoleptic features in the next day's MSLT.

Keywords: Obstructive sleep apnea syndrome (OSAS). Narcolepsy. Sleep deprivation. CPAP.