Cancer starts when cells in a part of the body start to grow out of control. Cancer cell growth is different from normal cell growth. Instead of dying, cancer cells continue to grow and form new, abnormal cells. Cancer cells can also invade (grow into) other tissues, something that normal cells cannot do. Growing out of control and invading other tissues are what makes a cell a cancer cell.
There are cancers such as leukemia that do not form tumors but thrive in the circulatory system depositing damaged cells throughout the body where they will end up growing (American Cancer Society, 2014). C... ... middle of paper ... ...r disease and to work on improving their quality of life at all levels. As a PTA it would be important to be aware of the different treatment methods and how that will affect your patient and their capabilities to exercise. It is important to be aware of any complications and to be able to get the patient immediate treatment if necessary. There are psychological factors that affect the patient as well and it is important to know how to get your patient the help and support they need.
Those cells together we would call it tumor. Specifically, cancer is a malignant tumor. We call it malignant is because not only because it could invade to the adjacent organs, but also because unfortunately cancer can spread to other tissues, and that can be life threatening. Cancer can occur anywhere in the body because there are
Proto-oncogenes are those genes that control normal but essential cell processes that keep cell growth and death in check. Two important categories are apoptosis genes, which regulate cell death, and tumor suppressor genes, which decrease cell propagation 1 . If these genes were mutated to the point where they cannot produce a functioning protein, cell division would continue far past what it was supposed to and unhealthy cells would be allowed to live and continue to multiply. This is what creates a malignant tumor. Certain conditions in the body can also promote the growth of cancer cells.
This causes the surviving cells to multiply and create a whole new colony resistant to that specific drug. Symptoms and Treatments. Cancer signs and symptoms are quite different and depend on where is the cancer located, how deep it has spread, and what is size of the tumor is. Some cancers can be either felt or seen through the skin , such as, a lump on the external lining can be an indicator of cancer in those locations. Other cancer types have signs that have a less physical appearance.
However, sometimes this orderly process goes wrong. The genetic material (DNA) of a cell can become damaged or changed, producing mutations that affect normal cell growth and division. When this happens, cells do not die when they should and new cells form when the body does not need them. The extra cells may form a mass of tissue called a tumor (NCI, 2013). In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invading nearby parts of the body.
Cancer is medically known as malignant neoplasm or malignant tumor. It is characterized by abnormal or uncontrolled division & growth of cells, caused by pathological breakdown in the process of cell proliferation (Steward & Kliehues, 2003). The cells in our body grow normally and divide in a controlled way in order to keep the body functioning normal. When normal cells get damaged, they die, and new cells take their place. However, this process may go wrong to generate new cells even when the body doesn't need them, or that the damaged cells may not die the way they should.
Malignant tumours are aggressive, invasive, and mobile. They invade healthy tissue and continue to divide. The original cancer is called the primary tumour. If the tumour is malignant, the disease may develop in other parts of the body where secondary tumours may form.
Sometimes malignant tumors will invade a healthy cell to make it an abnormal cancer cell. This is called metastasis. This occurs when the cancer cells leave the tumor through the bloodstream or lymphatic system to other parts of the body. When the cells come to rest the multiply and form a new tumor. This spreading is what makes cancer especially dangerous.
Though it can be difficult to identify which ones cause certain cancers because it may be hard to determine if someone has been exposed to something or not or if something they do is causing the cancer without actually testing it and proving that specific factor cancer causing. Now that you know some of the risk factors, there are a few things you can do to protect yourself from them. Do not smoke or expose yourself to an unnecessary air pollutants. Genetics and age, however, are things you cannot protect yourself from. Cancer type, location, aggression of the cancer, and which stage you are in will all help determine which treatment will be best for you.