What´s the Exact Cause of Cancer?

Cancer is defined by the National Cancer Institute as the title given to a group of related diseases. All types of cancer are categorized by uncontrollable growth of cells that metastasize to surrounding tissues. Cancer can develop at almost any part of the human body and anyone can develop cancer, although risk typically increases with age because most cancers tend to require many years to develop. ?Typically, human cells tend to grow and divide and ultimately form new cells as the body needs them. When an organisms cells grow old or get damaged, the cells die, and new ones replace them. However when cancer develops, this orderly process gets reformatted. As cells increasingly get more irregular, old or damaged cells begin to survive when they should die, and new cells develop in the body when there is no need for them. These abnormal cells have the ability to divide without stopping and tend to result in growths called tumors?(cancer.gov). Cancerous tumors are defined as malignant meaning that they can spread to nearby tissues or metastasize to distant places in places within the body and form new cancerous tumors. There are over 100 forms of cancer and they are usually named after the organs or tissues where the cancers originate. Staging of cancer is used when describing the severity of a person?s cancer and is based upon the following

Explain/say more: Nobody knows what actually causes cancer but lifestyle, exposure to harmful chemicals, diet, infections, and even genes are considered factors that can affect a person's risk of getting cancer.

Cancer is where abnormal cells divide uncontrollably and destroy tissue. With each special type of cell through differentiation each cancer is unique like Leukemia and breast cancer.

Cancer starts with the normal cells in our bodies. Normal cells divide in processes called Mitosis and Meiosis which is how our bodies grow, heal and repair and when cells become old or are damaged, they die and new cells are created. However, when this cell division process goes wrong the cells become abnormal. Cell abnormalities occur when the cell makes errors whilst copying the genes. As the cell becomes more abnormal, the old and damaged cells do not die when they are supposed to but the new cells, that are supposed to go in place of the dead cells, are still produced. The extra cells divide uncontrollably which is how a tumour is formed.

There are a wide variety of cancer types. They all have several things in common, however. Each cancer starts with cells that become abnormal or cancerous. These cells reproduce and form a mass of cancerous cells. This mass is called a tumor. When the cancerous cells spread, or metastasize, they can impact other tissues, organs, and systems of the body. A second commonality among cancers is that when they are detected early, they are easier to treat and the treatments are more likely to work. In many cases, a cancer that is caught early can be completely destroyed.

After the person becomes an adult, most cells divide only to replace worn-out or dying cells to repair injuries (“What is Cancer?” American Cancer Society). When cancer develops, this orderly process is broken down. As cells grow to be more and more abnormal, old or damaged cells survive when they should die. New cells form when they are not needed. Cancer cells come to be cancer cells because of variations, or mutations, to their DNA. In the cancer cells, damaged DNA is not restored, but the cell doesn’t die like it should. Instead, the cell goes on constructing new cells that the body doesn’t require. These new cells all have the same damaged DNA as the first cell does (“What is Cancer?” American Cancer Society). These cells may form growths termed tumors (“What is Cancer?” National Cancer Institute). Cancer cells are also able to disregard signals that routinely tell cells to halt dividing or that begin a process referred to as programmed cell death, apoptosis, which the body uses to get rid of unneeded cells. Cancer cells may be able to influence the normal cells, molecules, and blood vessels that frame and nourish a

Metastasis causes the most deaths in cancer yet this process remains one of the most enigmatic aspects of the disease. Metastasis has a two-phase process first phase is the physical translocation of the cancer cell and the second encompasses the cancer cell to develop into a metastatic lesion. Carcinogenesis is known as the formation of cancer, were normal cells transform into cancer cells. This process is by changes at the cellular, genetic and epigenetic level. It reprograms the cell to under go uncontrolled cell division by growing a malignant mass.

Common features among all types of cancer are metastasis, redirecting blood flow, unregulated cell proliferation, genomic instability and hiding from the immune system. The most dangerous aspect of cancer is that the disease can turn metastatic. 90% of cancer deaths come from metastasis (13). Metastasis is when somatic cells of the body have mutations in the genes that control cell placement. For example, if someone develops lung cancer, several cells in the tumor may leave the lung because the regulatory proteins that keep cells in place are no longer being made. This cluster of cells can travel to any part of the body and start to make tumors there. This is why someone can have lung cancer, but have tumors in their brain. In addition, tumors redirect blood flow so the cancerous cell population can stay alive. Furthermore, unregulated cell proliferation is when cancer cells divide despite signals to stop, and this is what causes tumors. Additionally, genomic instability is when your genes are in the wrong order in your genome. Your genome is all of your genes put together. If you think of a gene as an instruction to build a car part, the genome is the instruction manual to build the car. In cancer, cells have faulty instructions for cell

A malignant neoplasm is the medical terminology for Cancer, there are many types of cancers, however, they all are comprised of unregulated cells that show growth or a change. These cells that are cancerous, grow at a hasty rate and will take over other parts of the body, whether being another organ or tissue surrounding the compromised body part. This can also involve the lymph nodes, as well as travel through the bloodstream. There are many influences that contribute to the chance of developing cancers, some of these factors include tobacco use, being overweight and not physically active, exposures to chemicals, and poor nutrition and dietary selections, ones with mutagens in foods, continued or excessive consumption of alcohol, eating foods which are high in fats, and red meat just to name of few. Other types of cancer may be factored by family history, known as a genetic risk, as well as certain viruses that

Cancer cell growth is distinct from normal cell growth. Cancer begins when cells in begin to grow and develop out of control. Instead of dying like the normal cells, cancer cells keep to grow and produce new abnormal cells.

Cancer is a scary word. What is actually means is that a normal cell in the body has become abnormal. When these abnormal cells replicate, they often lump together and form masses we call tumors. Sometimes, the cells travel to other parts of the body. This spreading is known as metastasis. Cancers that are localized are much easier to treat than those which have metastasized.

Carcinogens are agents that can cause cancer in humans. Carcinogens may not cause cancer in every case. Substances that are labeled as carcinogens may have different levels of cancer-causing potential. Some cause cancer after only long, high levels of exposure. The risk of developing cancer depends on different factors, including how they are exposed to certain carcinogen, how high the levels of exposure are, and a person's genes. They can be man-made, such as cigarette smoke, or occur naturally in the environment, as is UV radiation from the sun, both of which play a huge role in the development of cancer. Carcinogens can also enhance other factors that cause the cancer. They can be classified three ways: chemical, physical, and oncogenic

This ability of malign cancer to make their way across basement membrane and into blood vessels is what makes cancer so fatal and impossible to be cure by surgery alone. The result of metastasis and invasion in normal tissue by cancer cells are often seen as one of the distinctive features of malignancy (Ruoslahti 1996). Even though the ability of invasion and metastasis are one of the hallmarks for cancer, these abilities are not unique to cancer cells as it can also occur during the early development stage of the embryo, in healthy organisms and in many noncancerous diseases (Mareel & Leroy 2003). It does not matter whenever the organism has developed benign or malign cancer, all cancer cells have the ability to disturb the normal cell cycle and threaten the survival of the organism.

Cancer can arise due to multiple causes, however knowing and avoiding some cancer causing substances may prevent many cancers. A major known cause of cancer cases is due to environmental and lifestyle factors. Examples of environmental and lifestyle factors that can increase the chances of cancer includes: cigarette smoking, excessive alcohol consumption, poor diet and lack of exercise, excessive sunlight exposure, and engaging in risky sexual behaviors which can increase exposure to certain viruses (Huether & McCance, 2012, p. 253).

Although not all cancers have an exact cause some of them do. According to the people I have known with lung cancer, there are many causes to the diagnosis. A few of the causes include smoking, second-hand smoke, and asbestos. Asbestos is also the cause of another cancer is caused mesothelioma. On the other hand, not all lung cancer is caused by these things. Some are simply caused by inherited gene mutations and are unpreventable. Effects of lung cancer are not good but not everyone experiences the same effects. Some people have