![]() ![]() What are the clinical signs of this type of tumor? In the case of pheochromocytomas, there is no known cause. Most seem to be caused by a complex mix of risk factors, some environmental and some genetic or hereditary. ![]() Very few tumors and cancers have a single known cause. The reason a particular pet may develop this, or any tumor or cancer, is not straightforward. ![]() "Adrenal medulla tumors are very rare in dogs and even more rare in cats." What causes this type of tumor? What is an adrenal medulla tumor?Ī malignant form of this tumor is called pheochromocytoma. It involves abnormal growth of the chromaffin cells in an uncontrolled way, causing the formation of a tumor.Īdrenal medulla tumors are very rare in dogs and even more rare in cats. The cells that create these hormones are called chromaffin cells. These hormones have various roles in the body for example, epinephrine and norepinephrine affect heart rate and blood pressure. The adrenal medulla is responsible for producing hormones such as epinephrine, norepinephrine, and dopamine. The inner part of the adrenal gland is called the medulla. The adrenal glands have an outer cortex that is responsible for producing many chemicals (hormones) that influence certain organs and metabolic activities in the body. The adrenal glands are a pair of glands located above each kidney. What are the adrenal glands and adrenal medullas?
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