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Figure 1: Patient 1: Treatment planning–Axial, contrast-enhanced stereotactic axial MR image, reveals a 4 cc residual juvenile nasopharyngeal angiofibroma in the region of the left pterygopalatine fossa extending into the cavernous sinus. The 50% isodose line (marked in yellow) corresponded to a 20 Gy marginal dose and covered 97% of the tumor (marked in red). The brainstem was segmented in magenta

Figure 1: Patient 1: Treatment planning–Axial, contrast-enhanced stereotactic axial MR image, reveals a 4 cc residual juvenile nasopharyngeal angiofibroma in the region of the left pterygopalatine fossa extending into the cavernous sinus. The 50% isodose line (marked in yellow) corresponded to a 20 Gy marginal dose and covered 97% of the tumor (marked in red). The brainstem was segmented in magenta