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Microsurgical Vascular Decompression for Trigeminal Neuralgia and Hemifacial Spasm.

Vascular cross-compression of cranial nerves has been proposed as the cause of cranial neuropathies, including trigeminal neuralgia and hemifacial spasm. Over the last decade we have used microsurgical vascular decompression to treat these two disorders. Results in 50 patients treated for trigeminal neuralgia have been excellent in 42, good in 5 and poor in 2; and 1 patient was cured after a second operation. Results in 22 patients treated for hemifacial spasm have been excellent in 18, good in 2 and fair in 1. One patient died. There were no late recurrences of symptoms. The pathophysiological mechanisms of trigeminal neuralgia and hemifacial spasm remain unknown.