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Schwannomas are very homogeneous tumors, consisting only of Schwann cells. The tumor cells always stay on the outside of the nerve, but the tumor itself may either push the nerve aside and/or up against a bony structure which can lead to damage. Schwannomas are relatively slow growing, and in most cases benign. Less than 1% become malignant, degenerating into a form of cancer known as neurofibrosarcoma.
TREATMENT
Surgery or Stereotactic Radiosurgery are typically the treatment prescribed for schwannomas. If weakness, numbness, pain, or other symptoms are present, then treatment of these lesions is usually recommended. Radiosurgery may be an option for schwannomas in the head or spine. Surgery is efficacious in resolving pain, weakness, and numbness in 80% to 90% of patients.
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