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Figure 1 :(a) MRI T1 post-gadolinium image (sagittal view) demonstrating the "Snowman" sign of pituitary adenoma. (b) Six months after GK radiosurgery, MRI T1 post-gadolinium image (sagittal view) demonstrating that the "Snowman" sign of pituitary adenoma had disappeared and the volume of pituitary was 1.6×1.6×0.5 cm in size

Figure 1 :(a) MRI T1 post-gadolinium image (sagittal view) demonstrating the