GH1 and pituitary tumor: Of these 11 patients, eight patients underwent pituitary tumor resection in our hospital, including cases 1, 2, 3, 6, 7, 8, 10, and 11, while cases 4 and 5 were treated surgically at other hospitals, and all postoperative pathology of the patients showed pituitary adenoma and immunohistochemistry showed GH positive.