reported are a total of 81 microsurgical operations for cranial nerve root decompression comprising of 66 trigeminal, 10 facial, one vestibular, one vagus and three accessory nerve dysfunction syndromes from 1983 to 1990. almost all cases of trigeminal neuralgia (tng) secondary to vascular (59 cases) and minute mass (10 cases) compression, and those with hemifacial spasm (hfs) (nine out of 10 c...