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
Also, younger-onset colon cancer appears to affect African-Americans more often than other groups. The most common symptoms of colon cancer are rectal bleeding and lower abdominal cramping. Other telltale symptoms may include a change in stool consistency, constipation, diarrhea or weight loss. Blood tests that reveal new-onset anemia can often signal the presence of a colon tumor. Unfortunately, colon cancer often is not considered as a cause of such symptoms in people who are younger than 50. As a consequence, colon cancer diagnosis can be delayed. Statistics show that colon cancer tends to be diagnosed at later stages in young people.