What is colon cancer?
Friday, March 19th, 2010Colon cancer is cancer that develops in the colon or rectum. Colon and rectum are parts of the digestive system, also known as stomach or gastrointestinal system. Digestive system processes food for energy and rids the body of solid waste (fecal matter or stool).
After food is chewed and swallowed, it moves through the esophagus to the stomach. E 'partially dismantled and sent to the small intestine, wheredigestion continues and most of the nutrients absorbed. The word "small" refers to the diameter of the small intestine, which is lower than the colon. Small intestine is actually the longest part of the digestive system – about 20 feet in length. Cancer is almost never occurs in the small intestine.
Small intestine ends in the lower right abdomen. The first and longest part of the large intestine, large intestine, a muscular tubeabout 5 meters in length. Water and mineral nutrients from the food matter is absorbed in the colon. Waste (feces) left by this process to run in the rectum, the last 6 inches of the colon, and was subsequently expelled. (The small and large intestine is also called the small intestine and large intestine).
Colon has 4 sections:
The first section is known as the ascending colon. It begins where the small intestine attaches to the colon and extends upward toright to the stomach of a person.
The second part is called the transverse colon, because it crosses the same right to left.
The third section, the descending colon continues down the left.
The fourth section is known as the sigma as a result of the S-shape. The end of the sigmoid colon, which in turn is connected to the anus.
Colorectal cancer usually develops slowly over a period of many years.Before a true cancer develops, usually begins as a noncancerous polyp that eventually could develop into cancer. A polyp is a growth of tissue that develops in the wall of the colon and rectum. Some types of polyps, called adenomas or adenomatous polyps, are more likely to become cancer.
Over 95% of colon cancer is adenocarci-mode, which develop from glandular tissue. For approximately 85% of colon and rectum, the tumor arises froman adenomatous polyp, which is visible through a scope or on an x-ray.
Once cancer of the colon, you can finally begin to grow through the lining and the lining of the colon and rectum. Tumors that have invaded the wall can grow into blood vessels and lymphatic channels that thin, that the confiscated mobile phones and liquid waste. Cancer cells before draining lymph nodes in the neighborhood, the bean-shaped structures that help fight infection.The process by which cancer cells travel to distant parts of the body via the blood or lymphatic vessels is called metastasis.
The extent to which colorectal cancer has spread can be described as the stadium. Tumors that have not even begun to conquer the lining of the colon and rectum were called, instead of cancer, and are not included in the statistics of cancer. More than one system used for clinical staging of the tumor. In this work, wedescribed the stages of colorectal cancer:
Locations: cancer, who grew up in the lining of the colon and rectum, but does not extend through the wall to invade the tissues
Health: Cancer that has spread through the wall of the colon and rectum, and had invaded the field of tissue or have spread to nearby lymph nodes
Ver: cancer that has spread to other parts of the body such as liver and lungs.