
Cancer of the rectum grows in an easily distensible part of the lower bowel, and accordingly obstructive symptoms virtually never occur. Instead the symptoms are of bowel irregularity, blood in the feces, and a constant urge to defecate, together with tenesmus, the feeling of incomplete bowel evacuation because ...

Cancer of the large intestine is far more common than cancer of the small intestine, because transit time is progressively slowed by fluid re absorption to form a semi solid stool, thus increasing contact exposure to fecal carcinogens. Cancer of the large intestine is also much more ...