How did cancer start in the world?
464545
cancer isn't really anything.  it's the unexplainable.  if anyone knew exactly what it was, there would be a cure / vaccine.  actually, there probably is... but the corporations make so much money from cancer research that they won't release it.  so to answer your question - it has always been and always will be.  check the cradle of civilization.
1166019
Cancer is a class of diseases or disorders characterized by uncontrolled division of cells and the ability of these cells to invade other tissues, either by direct growth into adjacent tissue through invasion or by implantation into distant sites by metastasis. Metastasis is defined as the stage in which cancer cells are transported through the bloodstream or lymphatic system. Cancer may affect people at all ages, but risk increases with age. It is one of the leading causes of death in developed countries.\n\nThere are many types of cancer. Severity of symptoms depends on the site and character of the malignancy and whether there is metastasis. A definitive diagnosis usually requires the histologic examination of tissue by a pathologist. This tissue is obtained by biopsy or surgery. Most cancers can be treated and some cured, depending on the specific type, location, and stage. Once diagnosed, cancer is usually treated with a combination of surgery, chemotherapy and radiotherapy. As research develops, treatments are becoming more specific for the type of cancer pathology. Drugs that target specific cancers already exist for several cancers. If untreated, cancers may eventually cause illness and death, though this is not always the case.\n\nThe unregulated growth that characterizes cancer is caused by damage to DNA, resulting in mutations to genes that encode for proteins controlling cell division. Many mutation events may be required to transform a normal cell into a malignant cell. These mutations can be caused by chemicals or physical agents called carcinogens, by close exposure to radioactive materials, or by certain viruses that can insert their DNA into the human genome. Mutations occur spontaneously, or are passed down generations as a result of germ line mutations.\n\nMany forms of cancer are associated with exposure to environmental factors such as tobacco smoke, radiation, alcohol and certain viruses. While some of these can be avoided, there is no known way to entirely avoid the disease, and public health and vaccination programs are also important on a global scale.\n\n\nI hope you find what your looking for.\n\nGood Luck!\n\n=)
298657
Cancer is characterised by mutations in genes that lead to uncontrolled cell growth, dvision and differentiation. Mitosis plays a great role in cancer development in that the cancer cells divide by mitosis, where the the daughter cells are diploid. Meiosis is another kind of division carried out in gametes (sperm cells and egg cells) where a daughter cell is haploid. So, somatic or body cells where cancer is developing divide in an uncontrolled manner by mitosis.
443799
No.  Cancer is a genetically-based disease, and can be caused by exposure to chemical toxins, such as those found in cigarette smoke, but it is not communicable (i.e. you can't catch cancer from a person who has cancer in the way you can catch a cold from a person who has a cold).\n\nSome cancers ARE linked to viruses that can be spread, notably HPV, which is linked to cervical cancer.  But the relative risk of getting cancer this way is very low...much, much lower than the risk of getting cancer due to family genetics.
291243
discovered?  has been described for centuries, women have died from this for most of history.\n\nDon't think there is a satisfactory answer for that.\n\nhow?  it was growing through her chest some time in 500BC, something like that.\n\nbest history of breast cancer can be found reading about Halsted, the father of modern surgery, and first man to improve survival in breast cancer patients.\n\nA great man, sorta, gotta read on this man to know anything about breast cancer.
686938
causes cancer\ni guess
739274
You will learn a great deal by reading this\n\nhttp://dgwa1.fortunecity.com/body/cancer.html
700628
God didn't create cancer, He created a world that was perfect.   When sin entered the world things started dying and decaying and getting old and diseased.   It wasn't God, it was satan and man.
43441
I don't know about all know diseases but they can't get cancer. We don't know why but for a couple of years scientist are studing shark to find a cure for cancer in humans.
611572
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.
279024
Cancer has been known of at least as long as we have written records. The Chinese were writing about cancers thousands of years ago. It was named because many types look like a crab.
721814
A type of cancer that begins in cells that line certain internal organs and produce mucin (the main component of mucus).
95272
Malignant cells cause cancer. Cells become malignant for a lot of reasons, some of them known, some of them unknown. Some viruses, carcinogenic materials, and genetic mutations are some possible causes.
528174
Tumours result from the over multiplication of cells. They may develop into cancers (malignant tumours) if not treated properly. \nCancers result from abnormal, uncontrollable growth of cells that kill other cells within the body and can occur anywhere in the body.
487932
wow, people who have no clue try to sound like medical experts.  I'm no medical expert, but I can lead you to a better answer.\n\nTelomere immortalization is one known element of cancer, so I'll use that to explain why smoking is a leading cause of cancer, but just know there are several other things that happen besides this.\n\nBasically cancers are cells that grow, bond, and refuse to die.  We're talking about cells that try to become immortal, and you can understand why.  The carbons and chemicals in your lungs actively block oxygen, which your lungs were designed to need.  Every time your body replaces dead cells (which it does constantly), it checks the environment they're in to see if they need to make adjustments.  Oxygen is essential to cell survival, so if you're choking them to death, they'll get desperate.  Some will just die.  Some will go on gasping for air.  But some will rebel from the body, which is killing them, and find their own mission.  And a tumor is born.  These are like lawless vigilantes who don't give a damn about being part of the body anymore.
1071874
google exactly what your looking for..... cancer can happen anywhere in your body and each have their own symptoms
802818
CANCER - Yes I can give lot of information but without knowing details from you it is difficult. I can only give general inforamtion. read -\n\nCancer is a class of diseases or disorders characterized by uncontrolled division of cells and the ability of these cells to invade other tissues, either by direct growth into adjacent tissue through invasion or by implantation into distant sites by metastasis. Metastasis is defined as the stage in which cancer cells are transported through the bloodstream or lymphatic system. Cancer may affect people at all ages, but risk tends to increase with age, due to the fact that DNA damage becomes more apparent in aging DNA. It is one of the principal causes of death in developed countries.\n\nThere are many types of cancer. Severity of symptoms depends on the site and character of the malignancy and whether there is metastasis. A definitive diagnosis usually requires the histologic examination of tissue by a pathologist. This tissue is obtained by biopsy or surgery. Most cancers can be treated and some cured, depending on the specific type, location, and stage. Once diagnosed, cancer is usually treated with a combination of surgery, chemotherapy and radiotherapy. As research develops, treatments are becoming more specific for the type of cancer pathology. Drugs that target specific cancers already exist for several cancers. If untreated, cancers may eventually cause illness and death, though this is not always the case.\n\nThe unregulated growth that characterizes cancer is caused by damage to DNA, resulting in mutations to genes that encode for proteins controlling cell division. Many mutation events may be required to transform a normal cell into a malignant cell. These mutations can be caused by chemicals or physical agents called carcinogens, by close exposure to radioactive materials, or by certain viruses that can insert their DNA into the human genome. Mutations occur spontaneously, and may be passed down from one generation to the next as a result of mutations within germ lines.\n\nMany forms of cancer are associated with exposure to environmental factors such as tobacco smoke, radiation, alcohol and certain viruses. While some of these risk factors can be avoided or reduced, there is no known way to entirely avoid the disease.\n\nif you require any specific information please post your question accoringly and there are persons like me to answer your qurries in details-.