Colorectal cancer, usually called colon cancer or bowel tumor, is a malignancy from unrestrained cell expansion in the colon or rectum, or in the . Symptoms normally embrace rectal bleeding and anemia which are at times connected with weight loss and changes in bowel behavior.

Colorectal malignancy begins when standard cells in the lining of the colon or rectum modify and multiply hysterically, forming a heap called a lump. A lump can be benign (noncancerous) or malignant (cancerous). These changes generally take years to expand; nevertheless, when a person has an unusual inborn disease, changes can take place within months to years. Both hereditary and environmental factors can be the root cause of the changes.

Colorectal tumor occurs because of lifestyle changes and mounting age with only a minority of cases connected with fundamental hereditary disorders. It characteristically starts in the inside layer of the bowel and if left untreated, can cultivate into the muscle layers beneath, and then throughout the bowel wall. Screening is effectual at decreasing the possibility of dying from colorectal tumor and is suggested starting at the age of 50 and enduring until a person is 75 years old. Contained bowel tumor is typically diagnosed during sigmoidoscopy or colonoscopy.

The colon and rectum make up the big intestine, which plays a significant role in the body’s capability to route waste. The colon makes up the first five to six feet of the large intestine, and the rectum makes up the remaining six inches, ending at the anus.

The colon has 4 sections. The ascending colon is the segment that extends from a pocket called the cecum (the foundation of the big intestine into which the undersized intestine empties) on the right side of the stomach. The slanting colon crosses the top of the stomach. The descending colon takes waste along the left side. Lastly, the sigmoid colon at the base takes waste a few more inches, down to the rectum. Waste leaves the body all the way through the .

Colorectal tumor generally begins as a polyp, a noncancerous expansion that may build up on the inner wall of the colon or rectum as people get older. If not treated or removed, a polyp can turn out to be a potentially serious tumor. Recognizing and treating precancerous polyps can put off colorectal tumor. Colorectal tumor can instigate in either the colon or the rectum. Cancer that begins in the colon is known as colon cancer, and cancer that starts in the rectum is known as rectal .