There are more than 100 types of cancer along with a variety of causes, ranging from radiation, chemicals, until the virus. But the similarities, cancer characterized by the abnormal growth of cells. Cancer what are the most deadly and incurable why?
According to the Centers for Disease Control and Prevention (CDC) cancer is the second leading cause of death in the United States 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. However, cancer treatment remains elusive due to many factors.
The 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 1970 to reach 65% at the moment.
"We can not make progress as it is today if it was not funded health sciences. Basis of science teaches us about 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:
Here are 10 types of cancer most commonly killed 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 major types of cancer: cancer of the lung cells are most prevalent, and small lung cell cancer spreads faster. More than 157,000 people are estimated to die from lung cancer and bronchial in 2010.
2. Colon and rectum cancer
Colon cancer tissue grows in the colon, whereas rectal cancer grows in a few centimeters of the large intestine near the anus. Most cases begin with small clumps of cells or benign polyps and over time grow into cancer.
Inspection is highly recommended to find polyps before they turn into cancer. Colorectal cancer is estimated to kill more than 51,000 people in 2010.
3. Breast cancer
Breast cancer is the second most popular cancer 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 inside the tube that carries 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 the estimated 37,000 inhabitants in 2010.
5. Prostate Cancer
Cancer is a leading cause of cancer death in men after number two lung cancer and bronchial. Prostate cancer usually grows slowly starts in the prostate gland, the gland that produces the 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 attacks the blood-forming tissue such as the bone marrow and lymphatic system. Blood cancer resulting in the overproduction of abnormal white blood cells.
Types of leukemia are classified by how fast spread and what cells are affected. Types of acute myelogenous leukemia is the most vicious 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 loss.
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 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 in the world, but rare 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 four numbers between 2003 and 2007. Average age of women 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 expected to die from ovarian cancer in 2010.
10. Esophageal cancer
This cancer starts in the cells that line the esophagus, the tube that carries food from the throat to the stomach, and usually occurs in the lower esophagus.
Men more likely to die than women due to esophageal cancer between 2003 and 2007. This cancer is estimated to kill 14,500 people in 2010.
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