Adrenal Gland Cancer (Pheochromocytoma) in Cats. Pheochromocytoma in Cats. A pheochromocytoma is a type of adrenal gland tumor which causes the gland to make too much of some of the hormones. This can cause an increase in heart rate, blood pressure, and breathing rate.
Shell company. A shell company is a company that exists but does not actually do any business or have any assets. The most interesting type of shell company (to investors) is one that has a listing. This is a listed shell, and is almost always what is meant by a reference to a shell in an investment context.
Some shell companies may have had operations, but those may have shrunk due to unfavorable market conditions or company mismanagement. Shell corporations are not in themselves illegal, and they do have legitimate business purposes. However, they are a main component of the underground economy, especially those based in tax havens.