When are acoustic neuromas considered fast-growing?

Isaac Yang, MD
In people with acoustic neuromas who were not being treated with radiation or surgery but rather just observation, an important indicator of future problems is the growth rate of the tumor over time. Researchers have found that tumors that grew 2.5 mm or more per year were more likely to cause problems. For instance, if a person has a small acoustic neuroma but the tumor is growing more than 2.5 millimeters per year, even if that person has no problems today, intervention is likely to be recommended at some point because evidence shows that it will cause problems later.

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