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Pituitary tumors often encroach upon the middle chiasm from below. Pituitary apoplexy is one of the few acute chiasmal syndromes. It can lead to sudden visual loss as the hemorrhagic adenoma rapidly enlarges. The embryonic remnants of Rathke's pouch may undergo neoplastic change called a craniopharyngioma. These tumors may develop at any time ...
Pituitary adenomas are tumors that occur in the pituitary gland. Most pituitary tumors are benign, approximately 35% are invasive and just 0.1% to 0.2% are carcinomas. [1] Pituitary adenomas represent from 10% to 25% of all intracranial neoplasms, with an estimated prevalence rate in the general population of approximately 17%. [1] [2]
In the high-dose 48-h DST, 2 mg of dexamethasone is given every 6 hours for 48 hours or a single dose of 8 mg is given. [8] This test is not needed if the 48-h low-dose DST has shown suppression of cortisol by over 30%. [8] These tests are based on the glucocorticoid sensitivity of pituitary adenomas compared to non-pituitary tumors. [8]
Autoimmune hypophysitis (or lymphocytic hypophysitis), inflammation of the pituitary gland due to autoimmunity. Nelson's syndrome, may occur after surgical removal of both adrenal glands, an out-dated method of treating Cushing's disease. Pituitary tumour, a tumor of the pituitary gland. Pituitary adenoma, a noncancerous tumor of the pituitary ...
Adenoma is a benign tumor of glandular tissue, such as the mucosa of stomach, small intestine, and colon, in which tumor cells form glands or gland-like structures. In hollow organs (digestive tract), the adenoma grows into the lumen - adenomatous polyp or polypoid adenoma.
Patients are typically offered testing if they have either a personal or family history of cancer that meets certain criteria, Zakalik adds. Those criteria have broadened over the last few years ...
Pituitary apoplexy is rare. [1] [2] Even in people with a known pituitary tumor, only 0.6–10% experience apoplexy; the risk is higher in larger tumors. [2] Based on extrapolations from existing data, one would expect 18 cases of pituitary apoplexy per one million people every year; the actual figure is probably lower. [14]
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