What is the classic clinical triad of pheochromocytoma?
Pheochromocytoma classically presents with paroxysms of hypertension and adrenergic symptoms including classic triad of episodic headache, sweating, and tachycardia.
Which chemical is important for diagnosis of pheochromocytoma?
The tests of choice to establish the diagnosis of pheochromocytoma are urinary normetanephrine and platelet norepinephrine. A combination of 131I-MIBG scintigraphy and diagnostic tests in urine, blood, or platelets does further improve the sensitivity.
What is a VMA test?
Vanillylmandelic acid (VMA) and other catecholamine metabolites such as homovanillic acid (HVA) measurement in urine are used for screening children for catecholamine-secreting tumors such as neuroblastoma and other neural crest tumors and monitoring those who have had treatment for these tumors.
What is pheochromocytoma and what are its signs and symptoms?
If you have a pheochromocytoma, the tumor releases hormones that may cause high blood pressure, headache, sweating and symptoms of a panic attack. If a pheochromocytoma isn’t treated, severe or life-threatening damage to other body systems can result.
What is the hallmark of pheochromocytoma?
The hallmark of pheochromocytoma is hypertension, which may occur in paroxysms against a backdrop of normal blood pressure, or the patient my have baseline hypertension with or without paroxysms of more extreme hypertension.
What are catecholamines and metanephrines?
Metanephrines are made when your body breaks down hormones called catecholamines. These hormones are made by the adrenal glands. Catecholamines help your body respond to stress. They are sometimes called “fight or flight” hormones.
Which symptom would a patient diagnosed with pheochromocytoma also experience?
But tumors can develop in both. If you have a pheochromocytoma, the tumor releases hormones that may cause high blood pressure, headache, sweating and symptoms of a panic attack. If a pheochromocytoma isn’t treated, severe or life-threatening damage to other body systems can result.
Can a CT scan miss a pheochromocytoma?
Pheochromocytomas appear on scintigrams as focal increased concentrations of radioactivity in the adrenal medulla but also in ectopic adrenergic tissue or metastases (Fig. 5). Paragangliomas can easily be missed on CT and MRI scans.