Is cancer a disease? A virus?!
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A disease marked by the uncontrolled growth of cells, often with invasion of healthy tissues locally or throughout the body. Cancer is the second leading cause of death in the U.S, after the cardiovascular diseases. In 2003 the American Cancer Society estimated that about 560,000 Americans died of cancer, and twice that number were newly diagnosed with one form or another of the disease. The most common cancers in the U.S. are lung, breast, colon, prostate, and skin. Because most cancers occur in patients who are age 65 or older, the incidence of cancer is expected to increase as the population ages. More than 200 kinds of cancer have been identified. Cancers that arise from epithelial tissues are called carcinomas; from mesenchymal tissues, sarcomas; from lymphatic cells, lymphomas; from blood-forming cells, leukemias. Cancer cells have several reproductive advantages over normal cells. They can make proteins that stimulate their own growth or that stimulate new blood vessels to bring them nourishment. They can produce enzymes that prevent their chromosomes from aging. They can invade the bloodstream and find places to grow in new tissues. Usually, as cancer cells proliferate, they become increasingly abnormal and require more of the body's metabolic output for their growth and development. Damage caused by their invasion of healthy tissues results in organ malfunction, pain, and, often, death.
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a disease unless you mean hpv which is a std that causes cancer
Cancer is a class of diseases characterized by uncontrolled cell division and the ability of these cells to invade other tissues, either by direct growth into adjacent tissue (invasion) or by migration of cells to distant sites (metastasis). This unregulated growth is caused by a series of acquired or inherited mutations to DNA within cells, damaging genetic information that define the cell functions and removing normal control of cell division.
en.wikipedia.org/wiki/Cancer
a disease but caused by a virus
Cancer is a group of many different diseases that share the same basic symptom; A group of cells that form a tumor begin to metabolize at a much higher rate than is normal.
For lots of info visit http://www.cancer.org
About 1 in four people get some form of cancer during their life.
It's a disease.
Cancer is a disease. Some think that it can be caused by a virus but it has not been proven. Cancer is unchecked cell growth in the body. In a normal person the cells would stop dividing when they come in contact with other cells. Cancerous cells do not they keep dividing. Cancer kills people by depriving their body of blood.
Your cells in your body are constantly splitting to maintain the body. Ones die off, new ones are created. The cells are constantly creating new ones. To replace skin, to replace blood, to renew organs, to repair.well sometimes the cells split and they don't get it right. A dysfunctional cell is formed. Under normal circumstances the body will destroy the bad cell. Three things have to fail in the body immunity system to develop cancer according to my college anatomy. Stress can cause one of them. When your immune system is down it allows disease. But back to the point your own cell now replicated wrong quickly multiplies. Taking over organs, can spread to the blood and then is deposited thru the cell walls and corrupts the whole system. As you can see there can be alot of different types of cancer depending on which cell malfunctioned and how.
it is neither
cancer is the overgrowth of a single cell. that cell will grow out of control and overtake other healthy cells that are doing their job. then those cells grow and the cancer spreads.
a tumor is those cells that are growing out of control
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