Cancer :: essays research papers fc

CancerINTRODUCTIONIn the American society, malignant neoplastic disease is the disease intimately feared by themajority of people within the U.S. Cancer has been cognise and describedthroughout history.In the earlyish 1990s nearly 6 million cancer cases and more than 4 milliondeaths have been reported worldwide, every year. The most fatal cancer in theworld is lung cancer, which has grown drastically since the spread of poofsmoking in growing countries. Stomach cancer is the second leading form ofcancer in men, after lung cancer. An otherwise on the increase, for women, is dresser cancer, especially in China and Japan. The fourth on the list is colonand rectum cancer, which occurs mostly in honest-to-goodness people.In the United States more than one-fifth of the deaths in the early90s was caused by cancer, only the cardiovascular diseases accounted at ahigher percentage. In 1993 the American Cancer Society predicted that about 33%of Americans will eventually start up cancer. In the United States skin cancer isthe most dominating in both men and women, followed by prostate cancer in menand breast cancer in women. Yet lung cancer causes the most deaths in men andwomen. Leukemia, or cancer of the blood, is the most common type in children.An increasing relative incidence has been clearly observable over the past few decades,due in part to improved cancer screening programs, and also to the increasingnumber of older persons in the population, and also to the large number oftabacco smokers--particularly in women. Some researchers have estimated that ifAmericans stopped smoking, lung cancer deaths could virtually be eliminatedwithin 20 years.The U.S. government and private organizations spent about $1.2 billionannual for cancer research. With the development of new drugs and treatments,the number of deaths among cancer patients under 30 years of age is decreasing,even though the number of deaths from cancer is growing overall.TYPES OF CANCER1.Cancer is the common term used to designate the mosst aggressive andusually fatal forms of a larger class of the diseases known as neoplasms. Aneoplasm is described as being relatively autonomous because it does not fullyobey the biological mechanisms that govern the growth and the metamorphosis ofindividual cells and the overall cell interactions of the living organism. Someneoplasms grow more rapidly than the tissues from which they arise, others growat a normal pace but because of the other factors eventually become recognizableas an abnormal growth and not normal tissue. The changes seen in neoplasm areheritable in that these characteristics are passed on from each cell to ots