Colon Cancer-Colorectal cancer

Most colorectal cancer is considered sporadic, meaning it occurs in people with no family history of the disease. So, we can blame a lot of things on our family, but usually colorectal cancer isn't one of them. It is more likely to occur as people get older. In general, both men and women at average risk of colorectal cancer should begin screening tests at age 50. Colon Cancer also known Colorectal cancer. Colon cancer 2nd most deaths for cancers in the US. The colon is the part of the digestive system where the waste material is stored. The rectum is the end of the colon adjacent to the anus.

Together, they form a long, muscular tube called the large intestine (also known as the large bowel). Tumors of the colon and rectum are growths arising from the inner wall of the large intestine.Benign tumors of the large intestine are called polyps. Malignant tumors of the large intestine are called cancers. Benign polyps do not invade nearby tissue or spread to other parts of the body. Benign polyps can be easily removed during colonoscopy and are not life-threatening. If benign polyps are not removed from the large intestine, they can become malignant (cancerous) over time.

Colon cancer is the term commonly used to describe colo-rectal (or bowel) cancer. The colon is part of the intestines. These consist of the small intestine (the section between the stomach and the appendix) and the large intestine (from the appendix to the anus). The large intestine is divided into the long colon and a short rectum, just before the anus. Two thirds of these cancers occur in the colon and one third in the rectum, with very few in the small intestine.

First Check Home ColoCheck Home Test

The human colon is a muscular, tube-shaped organ measuring about 4 feet long. It extends from the end of your small bowel to your anus, twisting and turning through your abdomen (belly). Colon cancer is cancer of the large intestine (colon), the lower part of your digestive system. Rectal cancer is cancer of the last 6 inches of the colon. Together, they're often referred to as colorectal cancers. About 112,000 people are diagnosed with colon cancer annually, and about 41,000 new cases of rectal cancer are diagnosed each year, according to the American Cancer Society.

Symptoms

Colon cancer often causes no symptoms until it has reached a relatively advanced stage. Thus, many organizations recommend periodic screening for the disease with fecal occult blood testing and colonoscopy. It is common in the Western world, and is rare in Asia and Africa. In countries where the people have adopted western diets, the incidence of colorectal cancer is increasing. Most cases of colon cancer begin as small, noncancerous (benign) clumps of cells called adenomatous polyps. Polyps of the colon and rectum are almost always benign and usually produce no symptoms. They may, however, cause painless rectal bleeding or bleeding not apparent to the naked eye. There may be single or multiple polyps. Polyps greater than 1 centimeter have a greater cancer risk associated with them than polyps under 1 centimeter. Polyps with atypia or dysplasia are also more likely to progress on to colon cancer. The risk of cancer is much higher in sessile villous adenomas than in pedunculated tubular adenomas. Cancer is found in 40% of villous adenomas, as compared to 15% in tubular adenomas.

Symptoms vary depending on the location of the cancer within the colon or rectum, though there may be no symptoms at all. Symptoms of colon cancer can include severe abdominal pain, blood in the stool or rectal bleeding, unexplained loss of weight, or major changes in bowel habits (recurrent constipation or diarrhea). In fact, the most common symptom is no symptoms at all," says Emina Huang, MD. But once these symptoms begin to develop, it may be a sign of more advanced disease. Half of people diagnosed after symptoms develop will die. Finding colorectal cancer before symptoms develop dramatically improves the chance of survival.