Pheochromocytomas are highly vascular.
Extra-adrenal Pheochromocytomas: Extra-adrenal Pheochromocytomas usually weigh
20 to 40 g and are <5 cm in diameter.
Pheochromocytoma recognizes a certain family predisposition
and is more common among young adults and in middle age groups.
Although Pheochromocytomas may grow to large size(>3 kg),
most weigh <100 g and are <10 cm in diameter.
Care should be taken in patients who have a history of duodenal ulcers or stomach ulcers,
bronchial asthma or Pheochromocytoma.
A healthy adrenal medulla will respond to the clonidine suppression test by reducing catecholamine production;
the lack of a response is evidence of Pheochromocytoma.
The main clinical treatment for acute heart failure, pulmonary congestion or
edema of vascular spasm, acrocyanosis, perceptual toxic shock and the diagnosis of Pheochromocytoma test etc.
Hence, once the Pheochromocytoma has been resected, thereby
removing the major source of circulating catecholamines, a situation arises where there is both very low sympathetic activity and volume depletion.