Patient: description of disease (onset time, main symptoms, hospitalization, etc.): blurred vision, headache. At the end of May, a pituitary tumor was detected with saddle region occupancy, the tumor was very large, 3.9*3.2*5.1cm. firstly, the tumor was operated via nasal surgery, which could not be removed cleanly due to the tumor adhering to the blood vessels, and then a gamma knife surgery was performed 7 days later. She was discharged a few days after surgery. After discharge, I recovered well and my vision has been restored, but I feel headache occasionally. May I ask the doctor: When is the best time for review after Gamma Knife surgery? How long does it usually take to see results? Two months after discharge from the hospital, the MRI showed that there is a tumor remaining in the blood vessel (the doctor in the county hospital said it is not serious), is this clinically significant? Is this clinically significant? Can I tell if the tumor will recur?