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What types of nasal tumors are there?
In some cases, chronic inflammation of the nose (rhinitis) leads to proliferation (hyperplasia) and formation of polyps in the nose or throat. These are not cancerous but may need removal. The chronic inflammation is often due to infections with viruses, bacteria and/or fungi and also occurs in animals with a tendency to allergies (atopic animals). Some chronic infections predispose to cancer.

What are neuroendocrine cells?
Neuroendocrine cells interact with the nervous system and produce specialized chemical substances called "neuroendocrine hormones". These hormones affect the rates of specific chemical reactions in other cells locally or in other tissues of the body. Together with the nervous system and other types of hormones they integrate and co-ordinate a wide variety of activities to maintain internal stability of the body. The neuroendocrine hormone producing cells are present in glands such as the adrenal medulla, chemoreceptors (aortic and carotid bodies) and pancreatic islets. They are also scattered throughout the body in a variety of organs including the skin, mouth, esophagus, intestine, liver and lung.

What are neuroendocrine cells and chemoreceptors?
Neuroendocrine cells produce specialized chemical substances called "neuroendocrine hormones". Neuroendocrine hormones interact with the nervous system and other hormones to integrate and co-ordinate a wide variety of activities to maintain internal stability of the body.