Acoustic neuroma: when should one operate?

Reviewing the investigation of 90 tumors of the cerebellopontine angle during the last 13 years reveals a gradual change in the philosophy of management. Newer investigate techniques and an increased awareness of these tumors have led to earlier diagnosis and treatment than formerly. Facial nerve function preservation is the aim in every case, and where possible residual hearing should be preserved. Treatment should be undertaken by the otolaryngologist, preferably in collaboration with the neurosurgeon. Four cases are presented.