Blood clots, especially those that originate in the brain, can occur very quickly. If there are lots of veins around to adequately redirect blood flow, the clot will stop growing at a certain point and the body can accommodate it indefinitely. It may even disappear with time.
Signs and symptoms of colon cancer include: A change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool, that lasts longer than four weeks Rectal bleeding or blood in your stool
When tumours have grown to a large size they may cause a change in the frequency or the diameter of the stool. Common symptoms of colorectal cancer include: 1  A change in bowel habits (persistent constipation or diarrhoea lasting more than 3 weeks).2  Blood on or in the stool that is either bright or dark. 3  Unusual abdominal or stomach pains. 4  Unexplained weight loss. 5  Anaemia.hen tumours have grown to a large size they may cause a change in the frequency or the diameter of the stool. Common symptoms of colorectal cancer include: 1  A change in bowel habits (persistent constipation or diarrhoea lasting more than 3 weeks).