Hypersomnolence and intermittent upper airway obstruction. Occurrence caused by micrognathia.

A patient with hypersomnolence, micrognathia, and respiratory insufficiency had been treated eight years for narcolepsy. Sleep apnea because of upper airway obstruction was found, and a tracheostomy was performed. Following this the hypersomnolence and respiratory insufficiency resolved. This case emphasizes the importance of carefully evaluating the condition of patients complaining of hypersomnolence to detect those with intermittent upper airway obstruction occurring during sleep.