Functional Neurosurgery with the Leksell Gamma Knife

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Abstract
Sixty patients underwent a total of 64 separate Gamma Knife radiosurgical procedures for treatment of a variety of functional disorders between July 1992 and February 1995. Thirty-four patients with intractable pain received unilateral (32 patients) or bilateral (2 patients) lesions in the intralaminar thalamus. Twenty-nine patients with facial pain, including 19 with typical trigeminal neuralgia, 8 with facial pain due to tumors involving the trigeminal nerve and 2 with other forms of facial pain, were also treated. Five patients with Parkinson''s disease underwent pallidotomy (2) or thalamotomy (3) with the Gamma Knife and 2 patients with non-Parkinson''s tremor were also treated with gamma-thalamotomy. The rate of improvement or resolution of the functional disorders was similar to that seen with other forms of surgical therapy. No immediate complications were seen, but 4 patients who underwent thalamotomy for pain developed delayed transient complications and 1 death was seen following bilateral thalamotomy.

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