Figure 4
From: Thirty-year clinical experience in gamma knife radiosurgery for trigeminal schwannomas

Illustrative case showing tumor size reduction and symptom improvement at 4 months after GKRS (12 Gy, 50% isodose line). The patient experienced facial pain worsening at 10 years after GKRS. Brain magnetic resonance imaging shows tumor progression. The patient underwent a second GKRS (13 Gy, 50% isodose line) and was followed up. GKRS gamma knife radiosurgery.