Search results
Results From The WOW.Com Content Network
Diagnosis usually occurs upon investigation of a cause for already suspected Cushing's syndrome. High levels of cortisol observed in patients with PPNAD are not suppressed upon administration of dexamethasone (dexamethasone suppression test), and upon MRI or CT imaging, the pituitary will show no abnormalities. Measuring ACTH will confirm that ...
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.
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.
Pituitary - empty sella syndrome [1] MRI of Empty Sella: Specialty: Endocrinology Symptoms: Cryptorchidism: Causes: Arachnoid presses down on gland (another possibility is a Tumor, Radiation therapy) [1] Diagnostic method: MRI, CT scan [1] Medication: Manage abnormal hormone levels [1]
MRI is the gold standard for diagnosing the empty sella sign. Key features include: [5] CSF signal: The sella turcica is filled with material that follows the signal characteristics of CSF on T1-weighted and T2-weighted images. Flattened pituitary gland: The pituitary gland appears thin and plastered against the sellar floor or walls.
Autoimmune hypophysitis can lead to deficiencies in one or more pituitary hormones, causing central diabetes insipidus if the posterior pituitary gland is affected as well as central adrenal insufficiency and central hypothyroidism if the anterior pituitary gland is affected. [1] The symptoms depend on what part of the pituitary is affected.
In pituitary apoplexy the results are typically normal, although abnormalities may be detected if blood from the pituitary has entered the subarachnoid space. [ 2 ] [ 4 ] If there is remaining doubt about the possibility of subarachnoid hemorrhage (SAH), a magnetic resonance angiogram (MRI with a contrast agent) may be required to identify ...
Computed Tomography (CT scan) is another indicator of abnormalities in pituitary gland size; it also gives an image of the pituitary, but is less sensitive than the MRI. [43] In addition to assessing the size of the pituitary tumor, physicians also look for damage to surrounding tissues, and perform tests to assess whether production of other ...