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May 1989

Audiologic Findings After Stereotactic Radiosurgery in Acoustic Neurinomas

Author Affiliations

Ann Arbor, Mich

Arch Otolaryngol Head Neck Surg. 1989;115(5):553-555. doi:10.1001/archotol.1989.01860290011004

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In a presentation before the 1988 fall meeting of the American Academy of Otolaryngology–Head and Neck Surgery in Washington, DC, Anita Hirsch and Georg Noren, Karolinska Institute, Stockholm, Sweden, reported their experience from 1969 through 1984 with stereotactic radiosurgery in the treatment of 126 patients with acoustic neurinomas. Preoperative and postoperative hearing levels were evaluated, with a mean follow-up of 4.7 years and a range of 0.7 to 12.8 years. Sixty-five patients had speech-reception threshold values greater than 50 dB. In those with unilateral acoustic neurinomas, hearing was preserved in 24% of patients, decreased in 54% of patients, and lost in 22% of patients. In those with neurofibromatosis, hearing was preserved in 36% of patients, diminished in 55% of patients, and lost in 9% of patients. Shrinkage of the tumor or arrest of growth was seen in 44% and 42% of ears, respectively. There were no deaths. Transient facial weakness

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