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If a patient has the characteristic signs and symptoms of a pheochromocytoma and the decision is made to pursue additional biochemical (blood work) evaluation, the differential diagnosis is important as it is more likely to be something other than a pheochromocytoma given the relative frequency of 0.8 per 100,000 person-years.
A plasma level of metanephrines should be checked before surgical thyroidectomy takes place to evaluate for the presence of pheochromocytoma since 25% of people found to have medullary thyroid cancer have the inherited form from the MEN2A syndrome. Undiagnosed pheochromocytoma leads to a very high intraoperative risk of hypertensive crisis and ...
The metanephrines are a group of molecules consisting of metanephrine and normetanephrine. An article in the Journal of the American Medical Association, 2002, indicated that the measurement of plasma free levels of metanephrines is the best tool in the diagnosis of pheochromocytoma, an adrenal medullary neoplasm. [1]
Hormonal evaluation can also be helpful, which includes: [11] 1-mg overnight dexamethasone suppression test; 24-hour urinary specimen for measurement of fractionated metanephrines and catecholamines; Blood plasma aldosterone concentration and plasma renin activity, if hypertension is present
Metanephrine, also known as metadrenaline, is a metabolite of epinephrine (also known as adrenaline) created by action of catechol-O-methyl transferase on epinephrine. An article in the Journal of the American Medical Association, 2002, indicated that the measurement of plasma free levels of the metanephrines group of molecules (including metanephrine and normetanephrine) is the best tool in ...
Multiple endocrine neoplasia type 2 (also known as "Pheochromocytoma (codons 630 and 634) and amyloid producing medullary thyroid carcinoma", [1] "PTC syndrome," [1] and "Sipple syndrome" [1]) is a group of medical disorders associated with tumors of the endocrine system. The tumors may be benign or malignant .
All adrenal masses should receive hormonal evaluation. Hormonal evaluation includes: [6] 1-mg overnight dexamethasone suppression test; 24-hour urinary specimen for measurement of fractionated metanephrines and catecholamines; Blood plasma aldosterone concentration and plasma renin activity, if hypertension is present
When the same type of tumor is found in the adrenal gland, they are referred to as a pheochromocytoma. They are rare tumors, with an overall estimated incidence of 1 in 300,000. [ 1 ] There is no test that determines benign from malignant tumors ; long-term follow-up is therefore recommended for all individuals with paraganglioma.