Cancer is a collective name for many different diseases that can occur in different parts of the body. Cancer diseases have different symptoms, different prognoses, and are treated in different ways. They have one thing in common: They arise because one or more cells change and develop into cancer cells.<\/p>\n\n\n\n
Cancer cells proliferate uncontrollably.\u00a0Eventually, a cancerous tumor<\/strong> may have formed.\u00a0The cancerous tumor may be in the way or otherwise, prevent the body from functioning properly.<\/p>\n\n\n\n There are also benign non-cancerous tumors. You can read about benign tumors here.<\/p>\n\n\n\n Everything in the body is made up of many billions of cells. For example, the skin consists of skin cells and the liver of liver cells. The cells need to divide to form new cells. They replace old and damaged cells. In this way, the body can grow and function. Different cells divide often. For example, some blood-forming cells divide almost every day, while liver cells divide about once a month. Some cells, like nerve cells, can divide even more rarely.<\/p>\n\n\n\n When the cell divides, it first doubles its contents. Then the cell divides into two cells.<\/p>\n\n\n\n For the most part, cell division works as it should, but sometimes it can be wrong.\u00a0There may have been damaged inside the cell so that it has changed.\u00a0Changed cells that continue to divide can lead to cancer.<\/p>\n\n\n\n In each cell, there is a nucleus that contains the genetic mass, also called DNA.\u00a0Parts of DNA are called genes.\u00a0They control what the cell should do so that our body is built up and functioning.\u00a0The genes also control cell division.<\/p>\n\n\n\n The cell division is carefully regulated.\u00a0Some genes control when the cell divides.\u00a0Other genes control when it’s time for the cell to stop dividing.\u00a0There are also genes that control when the cell needs to repair the damage so that the damage is not passed on at the next cell division.<\/p>\n\n\n\n It can lead to cancer if there is an injury in precisely the genes that control the cell’s division or ability to repair an injury.<\/p>\n\n\n\n You can read more about DNA damage in the chapter Why cancer<\/strong> occurs.<\/p>\n\n\n\n It is called cell changes when many cells in one area of \u200b\u200bthe body function differently due to DNA damage.<\/p>\n\n\n\n Many cell changes stop before they lead to cancer.\u00a0But if the altered cells continue to divide, there is the risk of new damage in their DNA.\u00a0For each new injury, the cells function more and more differently.\u00a0Eventually, the cells have so much damages to the genes that they have become cancer cells.<\/p>\n\n\n\n Cancer cells have some typical characteristics:<\/p>\n\n\n\n Cancer cells usually form a nodule called a cancer tumor.\u00a0There are cancerous diseases where cancerous tumors<\/em> are not formed, such as\u00a0leukemia.\u00a0However, the leukemic cells cause damage by displacing other cells so that the blood cannot be formed properly.<\/p>\n\n\n\n It takes a long time for cancer to develop.\u00a0It depends on where the body cancer begins.\u00a0Some times it takes several years from the first DNA damage until the cancer is detected.\u00a0Other times it goes faster.<\/p>\n\n\n\n The development from normal cells to cancer is usually divided into a preliminary stage and four phases:<\/p>\n\n\n\n One phase does not have to pass on to the next phase. The changes can stop. This is especially true of the pre-stage and the first phase.<\/p>\n\n\n\n In the pre-stage, the cells increase in number but behave as usual. It may be a precursor to cancer, but need not be. The body usually manages to deal with precursors or hyperplasia.<\/p>\n\n\n\n In the first phase, the cells are multiple.\u00a0They begin to change their appearance and lose their original function.\u00a0Such cell changes can be seen with a microscope, for example, if you have left a\u00a0cell sample from the cervix in a tissue sample from, for example, a birthmark.\u00a0Cell changes can sometimes stop.<\/p>\n\n\n\n In the second phase, the cells are so changed that they have become cancer cells. In situ means in place and means that the cells are still growing in one place. They do not penetrate other tissues or organs.<\/p>\n\n\n\n In the third phase, the cancer cells have changed even more. They move and penetrate organs and other body tissues that are all around.<\/p>\n\n\n\n In the fourth phase, the cancer cells enter the blood vessels and the lymphatic system and in this way spread to other parts of the body.<\/p>\n\n\n\n Cells that spread from a cancerous tumor to other parts of the body can form new cancerous tumors<\/span>.\u00a0They are called daughter tumors, or metastases.\u00a0Metastases occur more frequently in some organs than in others, such as the lymph nodes, lungs, skeleton, liver, and brain.\u00a0It is different for different cancers.<\/p>\n\n\n\n If you are being treated for cancer you may read or hear different terms that describe the disease.\u00a0One word that doctors often use to describe the spread of cancer is the tumor stage.\u00a0The tumor stages are roughly in agreement with the different phases.<\/p>\n\n\n\n The word tumor grade is used to describe how the properties of altered cells are. For example, it can be how fast the cells grow and how different they have become.<\/p>\n\n\n\n As cancer develops, the cells change in different stages: one precursor and four stages. Here you can read more about them.<\/p>\n\n\n\n Some cancers are hereditary and then it is safe to say what caused the disease.\u00a0An example is the childhood cancer\u00a0retinoblastoma.<\/p>\n\n\n\n But for the most part, it is impossible to say why an individual gets cancer.\u00a0It is known that cancer<\/span> begins with cell changes and that cell changes are due to a type of damage within the cell that makes the cell function more and more different for each cell division.\u00a0But several things are important for a cancer disease to develop.<\/p>\n\n\n\n One thing could be how sensitive our cells are to the effects that can cause damage. Sensitivity varies from person to person.<\/p>\n\n\n\n Another thing is the age.\u00a0The longer we live, the greater the risk that we will have different genes in the genes.\u00a0Therefore, cancer is also more common as we get older, although children can also get cancer.<\/p>\n\n\n\n DNA in a cell can be damaged for a variety of reasons. Here are some examples of what can cause such damage, also called mutations:<\/p>\n\n\n\n Some mutations are hereditary. Then you have received a damaged gene from a parent or from both parents.<\/p>\n\n\n\n It is quite common for DNA damage to occur in a cell.\u00a0Many DNA damages you can live with without noticing anything.\u00a0In addition, you have the vast majority of genes in a double set, one from each genetic parent.\u00a0If a particular gene is damaged in a cell, it can sometimes suffice for the corresponding gene from the other genetic parent to function.<\/p>\n\n\n\n The cell can also stop the damage from being passed on if needed.\u00a0Either the cell fixes the damage before the cell division or it destroys the cell itself.<\/p>\n\n\n\n Cancer can occur if the damage is in the genes that control cell division or the ability to repair or destroy itself.<\/p>\n\n\n\n How do I know if I have cancer? Can I prevent cancer?.<\/p>\n\n\n\n How a cancer disease develops depends on the type of cancer involved. The disease also varies from person to person. But often the possibility of treatment is greater the earlier the disease is discovered. This is because the cancer cells have not been able to change as much as in later stages of the disease. It is the characteristics of the cancer cells that determine how easy or difficult it is to treat the disease. The size of the cancer tumor usually has less significance.<\/p>\n\n\n\n The more that is known about how the cancer cells behave, the more the treatment can be adapted to be as effective as possible, and with fewer side effects.<\/p>\n\n\n\n It is common with surgery, cytostatics or radiation to treat cancer. Sometimes there are other treatments as well. It is common for different treatments to be combined.<\/p>\n\n\n\n Cancer has been around longer than humans. For example, dinosaurs have been found with cancer. Plants can also get cancer.<\/p>\n\n\n\n One reason why more and more people are getting cancer in our time is that we live so long.\u00a0In the past, many people died of other diseases before they got cancer.\u00a0The fact that more and more people are getting a cancer diagnosis is also because we have become better at finding and diagnosing cancer earlier, that is, separating cancer from other diseases.<\/p>\n","protected":false},"excerpt":{"rendered":" Cancer is a collective name for many different diseases that can occur in different parts of the body. Cancer diseases have different symptoms, different prognoses, and are treated in different ways. They have one thing in common: They arise because one or more cells change and develop into cancer cells.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[2,22,711],"tags":[44,773,770],"class_list":["post-581","post","type-post","status-publish","format-standard","hentry","category-diseases","category-cancer","category-facts-about-cancer","tag-cancer","tag-dysplasia","tag-what-is-cancer"],"_links":{"self":[{"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/posts\/581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/comments?post=581"}],"version-history":[{"count":5,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/posts\/581\/revisions"}],"predecessor-version":[{"id":3183,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/posts\/581\/revisions\/3183"}],"wp:attachment":[{"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/media?parent=581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/categories?post=581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zeepedia.com\/medical\/wp-json\/wp\/v2\/tags?post=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Cell division – a complicated process<\/h2>\n\n\n\n
The genes control cell division<\/h3>\n\n\n\n
From cell change to cancer<\/h3>\n\n\n\n
Cancer develops in various stages<\/h2>\n\n\n\n
The precursor or hyperplasia cells become more numerous<\/h3>\n\n\n\n
First phase or dysplasia – cell changes<\/h3>\n\n\n\n
The second phase or cancer in situ – cancer that grows in a confined space<\/h3>\n\n\n\n
The third stage of invasive cancer – cancer that penetrates into tissue all around<\/h3>\n\n\n\n
The fourth phase or metastatic cancer – cancer that spreads to other parts of the body<\/h3>\n\n\n\n
More about metastases<\/h4>\n\n\n\n
Tumor stage and tumor grades<\/h4>\n\n\n\n
This is how cancer develops<\/h2>\n\n\n\n
This is how cancer develops<\/h3>\n\n\n\n
Why cancer occurs<\/h2>\n\n\n\n
Various causes of DNA damage<\/h3>\n\n\n\n
The cell can usually repair DNA damage<\/h3>\n\n\n\n
Treatment for cancer<\/h2>\n\n\n\n
Cancer has always existed<\/h2>\n\n\n\n
That’s why more and more people are getting cancer now<\/h4>\n\n\n\n