Cancer
What is cancer? Cancer is the abnormal and uncontrolled growth of cells that if left untreated can ultimately cause death. The word cancer came from the Greek word for crab, karkinos. The early Greek physicians who first described cancerous tumors had no notion of their cause or true nature, but they were struck by the resemblance if some invasive tumors to crabs: a hard mass with a claw like extensions and an aggressive nature. Cancer causes about 550,000 deaths a year. Although many people believe that cancer is one disease, there are actually in fact over a 100 different forms of cancer. Some cancers can be cured, but not all of them have cures. Even though each type has its own characteristics, all cancers share one common characteristic, and that is the abnormal cell growth. These abnormal cells form tumors that invade normal tissues and disrupt body functions. Tumors are cancerous when they spread to other parts of the body. These types are called malignant, while tumors that do not have the potential to spread are called benign.
Benign tumors are made up of cells similar to the surrounding normal cells and are enclosed in a membrane that prevents them from penetrating the neighboring tissues. They are dangerous only if their physical presence interferes with body functions. For example, if a benign tumor grows in the brain and blocks the flow of blood to the brain, that can kill a person. To find out what kind of tumor that the person might have, the doctor will either do an X ray or a biopsy. If the tumor shows to be benign they might leave it or they might choose to remove it. But, if it shows to be a malignant tumor, more drastic steps are taken to get rid of the tumors. In this paper I will talk abo...
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...http://www.best.com/~gek/#MedInfoColumbia-Presbyterian
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http://wwwnmob.nci.nih.gov/default.html
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http://www.oncolink.upenn.edu/disease/lung1
Skin Cancer
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AOL keyword: Cancer
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http://www.medicinenet.com/Script/Main/Forum.asp?li=MNI&d=86&cu=16583&w=0&ArticleKey=478
Skin Cancer
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http://cancernet.nci.nih.gov/wyntk_pubs/melanoma.htm
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Cancer is the term used to describe a group of diseases consisting of hundreds of ailments and although there exists so many different types of cancer, they all begin in a similar way. The body is made up of over a trillion cells, and cancer is the uncontrolled growth of malfunctioning cells in the body (Dawson, 1996). “Normal body cells grow, divide, and die in an orderly fashion. During the early years of a person’s life, normal cells divide faster to allow the person to grow. After the person becomes an adult, most cells divide only to replace worn-out or dying cells or to repair injuries” (American Cancer Society, 2012).
To understand more about this disease I did a research on it, and according to the National Cancer Institute: “Cancer is a term used for diseases in which abnormal cells divide without control and are able to invade other tissues. Cancer cells can spread to other parts of the body through the blood and lymph system”. Also, there are more than 100 different types of cancer. Cancer is not a single disease, but a group of related diseases.
According to “Medical News Today” cancer is a disease that is caused by an over growth of anomalous cells on one or more lungs. Cells often go up the air pipes which can cause difficulty to breath. Due to the over production of cells the tissue cells often begin to over produce; which results in tumors. There are two types of tumors: malignant and benign. Malignant tumors are the more dangerous of the two due to its invasive nature; which makes it cancerous. While benign is not invasive in other words non-cancerous. This is why cancer spreads to multiple areas and can be sometimes very difficult to fight. Cancer cells are abnormal not only because of their evasive nature, but also because of its irregular life cycle. Rather than expire like a regular cell, they continuously grow and duplicate which causes the disease to spread. This makes cell abnormal in shape and other qualities; known as a sickle cell. Due to the large growth and reproduction rate of the cells this makes the spreading of the cancer more rapid. Each cancer has specific symptom, for lung cancer the sympto...
Cancer is a disease when abnormal cells divide without control and invade other tissues in the body. Normal cells divide in a regulated way to generate new cells that are needed to keep the body healthy. Cancer cells are when the normal cell division process goes awry. When this happens cells don’t die like they’re supposed to, and new cells are produced when the body doesn’t need them. When cancer cells form a lump of tissue it’s called a tumor. There are two types of tumors, malignant, and benign. A benign tumor isn’t cancerous, and can often be removed, and in most cases, they don’t come back. Benign tumors do not spread to other parts of the body like malignant tumors. Malignant tumors are cancerous. The cells within the malignant tumor spread from one part of the body to another and also invade nearby tissue which is called metastasis.
Usually, normal cells die when they are old or damaged, newly grow cells will replace them. However, if something goes wrong, there may be too many new cells when the body only needs a few of them, and the body can’t get rid of old cells, it builds up a mass of tissue called tumor. There are two types of tumor, begin or malignant. Begin tumors are usually not harmful to human body, however, malignant tumors could be life threatening. This type of tumors will invade organs and tissues around them, travel through blood vessels or lymph vessels, attach to other tissues and destroy them. Malignant tumors arise in breast tissues and cause breast cancer.
Cancer is a deadly disease that affects millions of American families each year. In cancer, cell division isn't controlled. Usually, cells have to go through a set of checks and balances before they divide, in cancer that is nonexistent. The cells just keep duplicating until they eventually form disorganized clumps called tumors. Tumors can either be, benign, meaning that they do not possess the power to metastasize to surrounding areas. If a tumor has the power to metastasize, it is classified as a malignant tumor. In simple terms, a benign tumor is not cancerous, and a malignant tumor is. Cancer cells cannot perform the necessary functions they were created for. Some types of cancers, like pancreatic cancer, cannot be cured. Other cancers such as melanoma and breast cancer have high survival rates when caught early. The four major types of treatments used to treat cancer include, surgery to remove the affected organ, radiation, chemotherapy, or biological treatments.
Cancer is the name given to a collection of related diseases. In all forms of cancer: the cells in the body begin to divide uncontrollably and then spread into the surrounding tissues.
It has been difficult to develop an accurate definition for cancer. The reputed British oncologist Willis has defined cancer as "an abnormal mass of tissue, the growth of which exceeds and is uncoordinated with that of the normal tissues and persists in the same excessive manner after cessation of the stimuli which evoked the change" (Cotran et al., 1999).
Cancer Cancer is a disease in which cells grow out of control and invade, erode, and destroy normal tissue. Damaged genes cause this development of cancer. These damaged genes are often a factor caused by such things such as the environment, and can be influenced by inherited factors. As the very early damaged cells divide they can evolve into a malignant cell population, and lose the control mechanism that govern normal cell division. These malignant cells can then go on to form solid tumours that start to destroy normal tissue.
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. Cells become cancer cells because of DNA (deoxyribonucleic acid) damage. DNA is in every cell and it directs all the cell’s actions. In a normal cell, when DNA gets damaged the cell either repairs the damage or the cell dies. In cancer cells, the damaged DNA is not repaired, and the cell doesn’t die like it should. Instead, the cell goes on making new cells that the body doesn’t need. These new cells all have the same abnormal DNA as the first cell does.
There are two types of tumors, benign tumors and malignant tumors. Benign tumors are not cancerous. These types of tumors can usually be removed and do not come back in most cases. Benign tumors do not spread to other parts of the body and the cells do not invade other tissues. Unlike b...
Fewer than ten percent of most cancers are thought to be due to strong hereditary factors. Many physicians believe that prevention is the best way to effectively tackle cancer. One of those factors in prevention is the individual knowing their family history so that they can develop an awareness of their families' cancer lineage. Other factors are a balanced diet, not smoking, moderate alcohol consumption and exercise. Strong hereditary factors that increase cancer risk are more likely to be found in families that have:
Cancer is a disease that affects human somatic cells. It causes the cells to divide uncontrollably and form masses known as tumors. There are two different types of cancer tumors. Some tumors are benign and other tumors are malignant. Benign tumors look similar to the tissues that they came from and develop slowly. The tumor remains in the same area that the tumor originated in. Malignant tumors are formed from cells that do not resemble the tissue that they came from. They vary in shape and size. This enables pieces of the tumor to break off and spread to other places in the body. Over the past few decades cancer has become a very prominent disease. There are many different types of cancer and many different causes for the the disease. Most cancers are because of a genetic mutation. The most common type occur when a cell is dividing. Proto-oncogenes, which are alleles in a normal cells, mutate to form oncogenes. These oncogenes cause cancer because they do not allow the cells to self destruct or become epistatic. There have been several research projects which have been testing epistatis.