Pheochromocytoma is a neuroendocrine tumor that starts in the adrenal medulla, the inner part of the adrenal gland. There are two adrenal glands in the body, one on top of each kidney. The adrenal medulla normally produces hormones called catecholamines, including adrenaline (epinephrine) and noradrenaline (norepinephrine), which help control blood pressure, heart rate, and the …
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Merkel cell carcinoma is a rare type of skin cancer. It is a kind of neuroendocrine tumor, meaning it develops from neuroendocrine cells in the skin. Neuroendocrine cells are specialized cells that send signals by releasing chemical messengers in response to nerve activity. Merkel cell carcinoma tends to grow quickly and is more likely to …
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Carcinoid is an older term for a type of slow-growing cancer that arises from neuroendocrine cells — specialized cells found throughout the body that release hormones and chemical signals. In modern pathology, this tumor type is more commonly called a well-differentiated neuroendocrine tumor (NET). The two terms refer to the same general category of tumor, …
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