Fig. 3
From: Radiosurgery for classical trigeminal neuralgia: impact of the shot size on clinical outcome
The probability of treatment success and facial hypoesthesia according to the size of the shot and maximum dose (D0.035) to the brainstem. Groups 1 = patients treated with the 5-mm shot, (all maximum dose to the brainstem < 25 Gy, 43 patients), groups 2 = patients treated with the 6-mm shot, maximum dose to the brainstem < 25 Gy (32 patients), group 3 = patients treated with the 6-mm shot with a maximum dose to the brainstem ≥ 25 Gy (20 patients). The level of 12 months hypoesthesia was 11.3, 33.5 and 76.0%, respectively, p < 0.001 in each group. The level of recurrence of pain at 12 months was 26.4, 16.5 and 5%, respectively, p = 0.11