Ultra-Early Gamma Knife Stereotactic Radiosurgery for TN

Under local anaesthesia, a Leksell stereotactic head frame is fixed to the patient's head to allow for complete cranial immobilization during treatment. The retrogasserian (i.e., mid-cisternal) target will be utilized at a single 4 mm isocenter, and 40 Gy will be administered to the 50% isodose line while limiting the brainstem to 12 Gy.