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  2. Pituitary adenoma - Wikipedia

    en.wikipedia.org/wiki/Pituitary_adenoma

    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]

  3. Sheehan's syndrome - Wikipedia

    en.wikipedia.org/wiki/Sheehan's_syndrome

    Other hormone-secreting cells of the pituitary undergo rapid growth in pregnant women as well, which contribute to the gland's enlargement. [10] The anterior pituitary is supplied by a low pressure portal venous system. [15] The anterior pituitary is more commonly affected in Sheehan's syndrome because of the structure of the portal venous system.

  4. Cushing's disease - Wikipedia

    en.wikipedia.org/wiki/Cushing's_disease

    A CT or MRI of the pituitary may also show the ACTH-secreting tumor if present. However, in 40% of Cushing's disease patients MRI is unable to detect a tumor. [8] In one study of 261 patients with confirmed pituitary Cushing's disease, only 48% of pituitary lesions were identified using MRI prior to surgery.

  5. Pituitary apoplexy - Wikipedia

    en.wikipedia.org/wiki/Pituitary_apoplexy

    [16] [18] Before the introduction of steroid replacement, the mortality from pituitary apoplexy approximated 50%. [4] The name of the condition was coined in 1950 in a case series by physicians from Boston City Hospital and Harvard Medical School. [1] [19] The term "apoplexy" was applied as it referred to both necrosis and bleeding into ...

  6. Syndrome of inappropriate antidiuretic hormone secretion

    en.wikipedia.org/wiki/Syndrome_of_inappropriate...

    Syndrome of inappropriate antidiuretic hormone secretion (SIADH), also known as the syndrome of inappropriate antidiuresis (SIAD), [2] is characterized by a physiologically inappropriate release of antidiuretic hormone (ADH) either from the posterior pituitary gland, or an ectopic non-pituitary source, such as an ADH-secreting tumor in the lung. [1]

  7. Chiasmal syndrome - Wikipedia

    en.wikipedia.org/wiki/Chiasmal_syndrome

    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 ...

  8. Inferior petrosal sinus sampling - Wikipedia

    en.wikipedia.org/wiki/Inferior_petrosal_sinus...

    Inferior petrosal sinus sampling (or IPSS), is a diagnostic medical procedure used to determine whether excess adrenocorticotropic hormone (ACTH) is coming from the pituitary gland (usually a pituitary adenoma causing Cushing's disease) or from a source outside the pituitary (a rare tumor causing ectopic ACTH syndrome). The procedure is usually ...

  9. Multiple endocrine neoplasia type 1 - Wikipedia

    en.wikipedia.org/wiki/Multiple_endocrine...

    Multiple endocrine neoplasia occurs when tumors are found in at least two of the three main endocrine glands (parathyroid, pituitary, and pancreatico-duodenum). Tumors can also develop in organs and tissues other than endocrine glands. If the tumors become cancerous, some cases can be life-threatening. The disorder affects 1 in 30,000 people.

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