PMC9329627_01
MRI sequences demonstrating typical appearance of extensive skull base meningioma (upper row left: T1 without contrast, upper row right: T2, lower row: T1 with contrast).
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F1
They had slowly progressed over many years, now causing significant brainstem compression (Figure 1).
Leksell gamma plan snapshot of the radiosurgery plan.
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F2
The total treatment volume was 14.4 cc and a prescription dose of 12 Gy was delivered on the 50% isodose line (Figure 2).
Contrast-enhanced T1 MR images at the time of radiosurgery (left column), at 6 months follow-up (middle column) and at 52 months follow-up (right column).
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F3
At the last FU, 52 months after GKRS, the patient still has no residual symptom, walking independently without any aid, and complete tumor response is maintained on MRI (Figure 3).