(pituitary tumor) A neoplasm in the pituitary gland.

(pituitary tumor) A tumor that forms in the pituitary gland. The pituitary is a pea-sized organ in the center of the brain above the back of the nose. It makes hormones that affect other glands and many body functions, especially growth. Most pituitary tumors are benign (not cancer).

(pituitary tumors) Your pituitary gland is a pea-sized gland at the base of your brain. The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body. Pituitary tumors are common, but often they don't cause health problems. Most people with pituitary tumors never even know they have them. The most common type of pituitary tumor produces hormones and disrupts the balance of hormones in your body. This can cause endocrine diseases such as Cushing's syndrome and hyperthyroidism. Symptoms of pituitary tumors include: Headaches; Vision problems; Nausea and vomiting; Problems caused by the production of too many hormones. Pituitary tumors are usually curable. Treatment is often surgery to remove the tumor. Other options include medicines, radiation therapy, and chemotherapy.

New abnormal pituitary tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.

Neoplasms which arise from or metastasize to the PITUITARY GLAND. The majority of pituitary neoplasms are adenomas, which are divided into non-secreting and secreting forms. Hormone producing forms are further classified by the type of hormone they secrete. Pituitary adenomas may also be characterized by their staining properties (see ADENOMA, BASOPHIL; ADENOMA, ACIDOPHIL; and ADENOMA, CHROMOPHOBE). Pituitary tumors may compress adjacent structures, including the HYPOTHALAMUS, several CRANIAL NERVES, and the OPTIC CHIASM. Chiasmal compression may result in bitemporal HEMIANOPSIA.

(pituitary gland neoplasm) A benign or malignant neoplasm affecting the pituitary gland. The vast majority are pituitary neuroendocrine tumors (formerly pituitary adenomas).

Most pituitary tumors are adenomas. Symptoms include headache and endocrinopathies; endocrinopathies result when the tumor produces hormones or destroys hormone-producing tissue. Diagnosis is by MRI. Treatment includes correction of any endocrinopathy and surgery, radiation therapy, and dopaminergic agonists.

Pierre Marie, a French neurologist (Salpetriere Hospital, Paris) was the first to describe a disease that involved the pituitary gland. In 1886, he studied 2 patients with clinical findings of what he termed acromegaly and postulated that the pituitary gland was involved in the pathogenesis.

Pituitary tumors are abnormal growths that develop in your pituitary gland. Some pituitary tumors result in too many of the hormones that regulate important functions of your body. Some pituitary tumors can cause your pituitary gland to produce lower levels of hormones.

Pituitary tumour, most common cause of enlargement of the sella turcica, the bone cavity in the head in which the pituitary gland is located. There are two general types of pituitary tumours--hormone secreting and nonsecreting. There are five types of hormone-secreting pituitary tumours, named...