Fig. 2. Illustrative case. A 22-year-old male patient presented with visual field defects. A: Initial MRI showed pituitary adenoma. B: Suspicious residual.

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Fig. 2. Illustrative case. A 22-year-old male patient presented with visual field defects. A: Initial MRI showed pituitary adenoma. B: Suspicious residual mass identified after operation. C: 1-yr postoperative MRI showed progression. The patient was lost to follow-up without any further treatment. D: 6-yr postoperative MRI showed significantly progression with hydrocephalus. E: After the second operation, intra-cerebral hemorrhage with intra-ventricular hemorrhage occurred. F: An adjuvant gamma knife radiosurgery was conducted to the residual tumor. Fig. 2. Illustrative case. A 22-year-old male patient presented with visual field defects. A: Initial MRI showed pituitary adenoma. B: Suspicious residual mass identified after operation. C: 1-yr postoperative MRI showed progression. The patient was lost to follow-up without any further treatment. D: 6-yr postoperative MRI showed significantly progression with hydrocephalus. E: After. . . Brain Tumor Res Treat. 2016 Apr;4(1):1-7. http://dx.doi.org/10.14791/btrt.2016.4.1.1