Cancer is a disease that is caused by a division of cells that cannot be contained and affect other tissues in the body, which can be through invading other tissues directly or through the transportation of cancer cells to other parts of the body. Cancer comes in many different forms and can affect different types of people for a variety of reasons and causes.
The abnormal division and control of cells within the body can result in a lump being formed, and this is known as a tumor. If the cells do not affect other tissues within the body, the lump is classified as benign, which means that it is not life threatening. However, when cells are able to affect other tissues and parts of the body through invasion or metastasis, the tumor is classed as malignant and cancerous.
Among the different types of cancers, you will find carcinomas, sarcomas, and lymphomas. The most common are the carcinomas, which make up around eighty five percent of cancers and begin in the lining of organs within the body. Cancer tends to develop in the later years of a person’s life in most cases and is not as common among younger people as it is in older people. Although this disease can occur at any age, the risk of getting cancer can increase with age, and it is estimated that one in every three people will get cancer at some point.
Cancers can occur for a variety of reasons, and some cancers are the result of direct exposure to toxins, such as lung cancer, which is commonly associated with the toxins in cigarette smoke and is therefore linked to smokers. Mesothelioma is another type of exposure related cancer that stems from long-term or high-level exposures to asbestos fibers and dust that have become airborne and have been breathed in and settled in the lungs.
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