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
Some of the more common local symptoms of colon cancer include: 1  Changes in your bowel habits, such as bowel movements that are either more or less frequent than normal. 2  Constipation (difficulty having a bowel movement or straining to have a bowel movement)  Diarrhea (loose or watery stools)