Obstructive sleep apnea syndrome caused by oral cyst: a case report

A 47-year-old man with a typical obstructive sleep apnea syndrome (OSAS) secondary to a large oral cyst is reported. Although the patient also had a nasal septum deviation with narrowed air passage, removal of the cyst resulted in complete and lasting relief from clinical symptoms despite persisting sleep apnea and unchanged arousal reaction in the EEG. The concurrent mechanisms of OSAS in the present case are discussed, and the importance of searching for a curable underlying disorder in clinical overt OSAS is emphasized.