The incidence of pituitary tumor is more than 10%. 97% of pituitary tumor patients do not need treatment and regular observation is sufficient, and for the remaining 3% of patients who need treatment, as long as they are treated after standard evaluation, more than 95% of them can get normal endocrine function. The tumor disappears or is reduced to a safe size. Therefore, pituitary tumors are not uncommon. Although pituitary tumor is a relatively common disease and sometimes the tumor is benign, but do not be careless, after all, it is a tumor it will have some harm. So what are the dangers if you have a pituitary tumor? A. Pituitary tumor leads to hypogonadism Hypogonadism refers to impotence and decreased libido, and hypogonadism is one of the clinical manifestations of early onset pituitary adenoma. Pituitary tumor causes headache About 2/3 of patients have headache in the early stage. The pain is mild, mainly located behind the orbits, in the forehead and near the temples bilaterally, with intermittent attacks. Because pituitary tumors originate in the pterygoid saddle at the base of the skull, the saddle is surrounded by dense bone with only a tough saddle septum overlying it, and direct stimulation or growth of the tumor causes headaches due to increased pressure in the saddle. When the tumor grows upward and breaks through the saddle septum, the intra-saddle pressure decreases and the pain can be reduced or disappeared. Patients often feel that after a sudden severe headache, the pain is obviously relieved or reduced, but if no treatment is given, the pain will appear again with the growth of tumor. Pituitary tumor can break through the saddle base and grow downward in the butterfly saddle, and invade important blood vessels and nerves in both sides of the skull, but the most common way of growth is to develop to the saddle and compress the optic cross and optic nerve, which causes vision loss and visual field impairment, patients often complain of vision loss, can’t see both sides and always hit the door. Patients often complain of loss of vision, not being able to see both sides, and always hitting the door. If visual field impairment occurs, surgery is needed as soon as possible to release the compression on the optic nerve. If it is accompanied by growth in other directions, it is called invasive pituitary adenoma, which is significantly more difficult to treat and difficult to remove at once.