To go for examination of pituitary tumor in the brain, the following aspects are included: I. Clinical history questioning and examination, to observe when the patient has similar symptoms of pituitary tumor, such as dizziness, headache, visual impairment, etc., and then go to the specialized ophthalmology department to check the visual acuity and visual field, whether it is accompanied by loss of vision as well as visual field defects. Second, laboratory test, mainly is to draw blood to clarify the level of hormones, focusing on hormones such as prolactin, growth hormone, thyroid hormone and so on. Third, imaging examination, first start to do head CT to thin scan, can see the saddle area, pituitary gland whether there is an increase in size and changes in the surrounding tissue structure, if there are really corresponding abnormalities, also need to add the pteronasal region of the fine scanning CT for clarity and inspection, so all need to be combined together, to clarify the final diagnosis of pituitary tumors.