Pituitary tumors or pituitary adenomas account for 15% of cerebral tumors. They are almost all benign tumors of the anterior (front) of the pituitary gland, which creates a number of important hormones that control other glands in the body, such as the thyroid, testes, and ovaries. Other pituitary tumors can produce hormones, due to overproduction of these hormones. For example, a prolactinoma can lead to loss of periods, infertility or leakage of milk from the breast in women; or reason impotence in men.
Tumors that secrete growth hormone can reason acromegaly, where soft tissues in the body enlarge, such as the nose, tongue, fingers, and heart. They can also reason other situation such as hypertension and diabetes. In children, excess growth hormone produces gigantism.
An over-secretion of ACTH can reason Cushing’s disease, where patients develop high blood pressure, depression, diabetes, osteoporosis, and other problems. On rare occasions, pituitary tumors can secrete TSH, which can reason hyperactivity of the thyroid gland.