Colon is the division or portion of the digestive system wherein the waste matter is hoarded. The rectum is the last part of the colon near the anus. Jointly, they form the long, muscular tube which is called the large bowel or large intestine. Cancers of the rectum and also the colon are growths coming from the internal wall of the big intestine. Benign tumors arising in the big intestine are known as polyps. Malignant tumors of the big intestine are identified as cancers.
Benign nodules do not attack nearby tissue or scatter to some parts of the human body. Benign growths can be removed easily during colonoscopy and they are not critical. If benign growths are not detached from the big intestine, they will become cancerous. Majority of the cancers in the big intestine are supposed to arise from polyps. Cancer of the rectum and also the colon can attack and injure the nearby organs as well as tissues. Cancer cells will also scatter and break away to other portions of the human body, like the lings and liver wherein the new tumors are formed. The scatter of the colon tumor to remote organs is known as metastasis. After metastasis has happened in colorectal tumor, a comprehensive treatment of the malignancy is doubtful.
Internationally, malignant neoplasm of the rectum and colon is the 3rd primary cause of tumor in males and the 4th primary cause of tumors in females. The incidence of colorectal tumor varies worldwide. In countries wherein the people have taken up western diets, the occurrence of colorectal tumor is increasing.
Factors that add to the person’s danger of colorectal tumor include elevated fat intake, family record of colorectal polyps and cancer, the incidence of polyps in the big intestine, and constant ulcerative colitis.
Symptoms of colon tumors are nonspecific and numerous. They include weakness, fatigue, briefness of breath, narrow stools, diarrhea or constipation, change in bowel practice, red or dark blood in the feces, weight loss, cramps, abdominal pain, or bloating. Other situations like spastic colon, peptic ulcer, and ulcerative colitis are some symptoms of colorectal cancer.
Symptoms for colon cancer differ according to the location of the tumor in the big intestine. The right colon is large and cancers here can grow into big sizes before they cause abdominal signs. Usually, right-sided tumors can cause anemia because of the gradual blood loss over a long duration of time. Anemia causes weakness, fatigue and shortness of breath.
Left colon is slightly narrower compared to the right colon. Hence, tumors in the left colon possibly cause the complete or partial obstruction of the bowel. Cancers which cause partial obstruction of the bowel may cause signs of constipation, diarrhea, narrowed stool, cramps, abdominal pains and bloating. Dark red blood in the stool can also be indicative of a growth adjacent to the end of the rectum and left colon.