Carcinoid tumor is a type of neuroendocrine tumor that grows from neuroendocrine cells. Neuroendocrine cells receive and send messages through hormones to help the body function. Neuroendocrine cells are found in organs throughout the body. Carcinoid tumors often grow very slowly.
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Malignant brain tumors do not have distinct borders
Neuroendocrine tumors such as carcinoid tumors are rare, and no information consequently is yet available on cause or prevention.
Malignant tumors typically grow faster than benign tumors.
Malignant tumors grow faster and are more aggressive than benign tumors.
Rhabdomyosarcomas are rare types of muscle tumors. They typically grow on the tissue of striated muscle. These tumors are usually malignant.
Neuroendocrine carcinoid syndrome is the constellation of symptoms typically exhibited by patients with metastases from carcinoid tumors when the disease has advanced. Carcinoid tumors usually secrete excessive amounts of the hormone serotonin which triggers reactions and can include the following: Flushing Diarrhea Heart valvular lesions Cramping Telangiectasia Peripheral edema Wheezing Cyanosis Arthritis Pellagra Night Sweats
Malignant tumors
It is highly unusual for malignant brain tumors to spread beyond the central nervous system
Malignant tumors tend to have higher levels of antigenicity compared to benign tumors. Malignant tumors often express tumor-specific antigens, which can be recognized by the immune system and trigger an immune response. This increased antigenicity is due to the presence of mutated and abnormal proteins on the surface of malignant cells.
Tumors are of two types, benign or malignant. A benign tumor is not considered cancer. It is slow growing, does not spread or invade surrounding tissue, and once it is removed, doesn't usually recur. A malignant tumor, on the other hand.
Carcinoid tumors affect hormone-producing cells of our organs and can be found in the stomach, in the lungs, in the pancreas or in testicles (man) and ovaries (woman).