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.
A listed shell company must have had an active business in the past, or it could not have met the requirements for a listing. Exchanges often take a dim view of shell companies (and even cash shells) and may make it difficult for their listings to be maintained indefinitely without acquiring some real business.