We present four patients with trigeminal neuralgia treated by percutaneous rhizotomy of the Gasserian ganglion with balloon. The procedure was performed with fluoroscopic assistance with sedo analgesia without intubation. All patients were females. The sector most affected was V2 (50%). We obtained the three forms of balloon described (pear, hourglass, oval). In the four patients had immediate pain relief in the immediate postoperative. The procedure was ambulatory, except in one patient who was bedridden, in very poor general state of malnutrition, caused by the pain that prevented her from eating. She was discharged on the third day, eating well and walking around. One of the patients had mild dysesthesia that disappeared at the week of evolution. In all cases there was slight hypoesthesia in the hemifacie treated with progressive improvement and described as not significant for any patient.