[Effectiveness of intentional lateralization of the tympanic membrane to promote drainage of a large intracranial cholesterol cyst].
A 57-year-old male presented with headache and cerebellar symptoms. A magnetic resonance image demonstrated that the brain stem and the cerebellum were compressed by a large intracranial cholesterol cyst. Abundant drainage from the cyst into the tympanic cavity following the intentional lateralization of the tympanic membrane was very successful in aerating the cyst via the tympanic cavity, resulting in the eradication of the cyst. Our new method is recommended as a curative treatment for large intracranial cholesterol cysts because of its limited surgical stress and high radicality.