For patients with pituitary tumors, it is first recommended to perform a cranial CT or MRI examination, and if necessary, a cranial MRI with contrast and a pituitary MRI with contrast can be done to help determine the specific location, size, and relationship of the pituitary tumor with surrounding important blood vessels and nerves. Additionally, blood tests are needed to examine the levels of endocrine hormones in the body, including cortisol, growth hormone, prolactin, thyroid hormones, and other related hormone levels. Furthermore, further examinations of the patient's cardiopulmonary function, such as electrocardiograms, echocardiograms, and chest CT scans, are also required.