case_images: PMC3806188_01
case_images: Axial T1 postgadolinium enhanced MRI showing the lesion of the left trigeminal nerve at the time of its original diagnosis as trigeminal schwannoma.
case_images: CRIM.NM2013-256962.001.jpg
case_images: PMC3806188_01_CRIM.NM2013-256962.001.jpg
case_images: fig1
case_images: Two months later, another MRI revealed a slight increase in size of the lesion (Figure 1).
case_images: Three-dimensional rendering of the tumor in treatment planning of the patient's first GKRS treatment; the tumor is highlighted and is posteroinferior to the optic nerve which is also highlighted.
case_images: CRIM.NM2013-256962.002.jpg
case_images: PMC3806188_01_CRIM.NM2013-256962.002.jpg
case_images: fig2
case_images: Three months after her initial presentation, the patient received her first Gamma Knife treatment of 13 Gy at the 50% isodose line (Figure 2).
case_images: Sagittal treatment planning MRI for the patient's second GKRS treatment showing increased size and the tumor with the Gamma Knife isodose lines in coronal, sagittal, and axial views.
case_images: CRIM.NM2013-256962.003.jpg
case_images: PMC3806188_01_CRIM.NM2013-256962.003.jpg
case_images: fig3
case_images:  Based on this revised diagnosis, the patient received a 5-part fractionated Gamma Knife treatment of 6 Gy to the 50% isodose line each time for a total of 30 Gy (Figure 3).