There are more than 100 types of cancer as well as a wide variety of causes , ranging from radiation , chemicals , until the virus . But the similarities , cancer is characterized by abnormal cell growth . Cancer what are the most deadly and difficult to cure why ?According to the Centers for Disease Control and Prevention ( CDC ) cancer is the second leading cause of death in America after heart disease . Even when it was diagnosed early and dealt with cutting-edge treatment , cancer still has the power to kill .Indeed, there have been many successful treatments today and found some twenty years ago . But cancer treatment still remains elusive due to many factors .Growth of cancer cells still remains unpredictable and mysterious in some cases . In fact , after apparently effective treatment , cancer cells are able to hide in some patients and resurface .Approximately U.S. $ 200 billion ( approximately USD 1,800 billion ) has been spent on cancer research since the early 1970s . Survival for all cancer patients in the United States have increased from about 50 % in the 1970s to reach 65 % at the moment ." We will not be able to achieve such progress now not be funded if the health sciences . Basis of science teaches us about the mechanisms and effectiveness of drugs . We take that information and apply it to the clinic to find out if new ways of treating it successfully in cancer , " said Dr. Len Lichtenfeld , deputy chief medical officer dariAmerican cancer Society as reported myhealthnewsdaily.com .Here are 10 types of cancer most commonly fatal in 2003 and 2007, according to the National Cancer Institute ( NCI ) :
1 . Lung cancer and bronchial
Lung cancer and bronchial cancer is the number one killer in the United States . Smoking and use of tobacco products is the main cause . This cancer is most common in people aged 55-65 years .There are two main types of this cancer : lung cell cancer the most common large and small lung cell cancer spreads faster . More than 157,000 people are estimated to die from lung cancer and bronchial in 2010 .
2 . Cancer of the colon and rectum
Colon cancer tissue grows in the colon, whereas rectal cancer grows in a few centimeters of the large intestine near the anus . Most cases are preceded by small clumps of cells or benign polyps and over time grow into cancer . Inspection is highly recommended to find the polyps before they turn into cancer . Colorectal cancer is expected to kill more than 51,000 people in 2010 .
3 . breast cancer
Breast cancer is a cancer that is the second most popular in the United States after skin cancer . This cancer can also affect men . There are nearly 2,000 cases of breast cancer in men between 2003 and 2008 . Cancer cells usually form in the ducts that drain the milk to the nipple or the glands that produce milk . Nearly 40,000 people are expected to die from breast cancer in 2010 .
4 . pancreatic cancer
Pancreatic cancer appears in the pancreatic tissue that help regulate digestion and metabolism . Detection and early treatment is difficult because often silently and quickly spread . Pancreatic cancer claimed an estimated 37,000 inhabitants in 2010.
5 . prostate cancer
This cancer is the leading cause of cancer death in men after a second lung cancer and bronchial . Prostate cancer usually starts to grow slowly in the prostate gland , the gland that produces seminal fluid to transport sperm .Some types of cancer is still confined to the prostate gland , and is more easily treated . But other types are more aggressive and faster spreading . Prostate cancer is estimated to kill about 32,000 people in 2010 .
6 . leukemia
There are many types of leukemia , or cancer of the blood and all body tissues are attacked as blood-forming bone marrow and lymphatic system . Blood cancer resulting in the overproduction of abnormal white blood cells . Types of leukemia are classified by how fast spreading and any cells that are affected . Types of acute myelogenous leukemia is the most malignant and killed 41 714 people in 2003 to 2007 . Nearly 22,000 people are expected to die from leukemia in 2010 .
7 . Non-Hodgkin's Lymphoma
This cancer attacks the lymphocytes , a type of white blood cells and is characterized by swollen lymph nodes , fever and weight decreased . There are several types of non- Hodgkin's lymphoma and categorized based on the speed of growth and the type of lymphocytes are affected . Non- Hodgkin's lymphoma is more deadly than Hodgkin 's lymphoma and is estimated to have killed more than 20,000 people in 2010 .
8 . Liver cancer and intrahepatic bile duct
Liver cancer is one of the most common forms of cancer worldwide , but rarely found in the United States . This cancer is closely related to intrahepatic bile duct cancer that attacks the ducts that carry bile from the liver to the small intestine . Nearly 19,000 Americans are expected to die from Kaner liver and intrahepatic bile duct in 2010 .
9 . ovarian Cancer
Ovarian cancer is the leading cause of death from cancer in women fourth . The average age of women who are diagnosed with this cancer is 63 years . This cancer is more easily treated but it is more difficult to detect at an early stage . Symptoms include abdominal discomfort , urgency to urinate and pelvic pain . Nearly 14,000 women are expected to die from ovarian cancer in 2010 .
10 . esophageal cancer
This cancer starts in the cells lining the esophagus , the tube that carries food from the throat to the stomach , and usually occurs in the lower part of the esophagus .
Men more likely to die than women due to esophageal cancer between 2003 and 2007 . This cancer kills an estimated 14,500 people in 2010 .
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