Rectal cancer refers to the cancer of the rectum, which affects the lower part of the colon that connects to the anus. It is a part which stores formed stools. Causes of Rectal cancer may be Cigarette smoking, Ulcerative colitis or Crohn's disease, Genetic alterations, Family medical history, Personal medical history, Age. Treatment depends on how deeply the rectal tissue has been affected, stage of the disease etc.

The lower part of large intestine where the body stores stool is called rectum. It is the last 6 to 8 inches of the large intestine. Problems with rectum are common such as: hemorrhoids, abscesses, incontinence and cancer. The rectum stores solid waste until it leaves the body through the anus. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.