Multiple sclerosis is an autoimmune disease that affects the brain and spinal cord (central nervous system). Multiple sclerosis (MS) affects women more than men. The disorder is most commonly diagnosed between ages 20 to 40, but it can be seen at any age. MS is caused by damage to the myelin sheath. This sheath is the protective covering that surrounds nerve cells.
Typically benign tumors, adenomas often press on the pituitary gland, causing loss of function of one or more hormones. Many pituitary adenomas are called âfunctioning tumorsâ because they actually make hormones and may cause an increase in hormone levels instead of a decrease.
endocrine-active adenoma a pituitary adenoma that secretes excessive amounts of a hormone; see prolactinoma, corticotroph adenoma, gonadotroph adenoma, growth hormoneâsecreting adenoma, and thyrotroph adenoma. Called also hyperfunctional or hyperfunctioning adenoma.epatocellular adenoma a large, fleshy, hypervascular tumor of the liver occurring chiefly in women of childbearing age and associated with oral contraceptive use. It is composed of sheets of cells with areas of hemorrhage and necrosis and has a tendency to hemorrhage and rupture; it may become malignant.