Question: what are the signs and symptoms of stage 4 colon cancer?
Answer: Blood (usually dark red or black) in the stool. Constipation and diarrhea. These can also be symptoms of other, less serious conditions. ...  Long, thin, pencil-like stools. ...  Fatigue and weakness. ...  Abdominal pain or bloating. ...  Unexplained weight loss. ...  Nausea and vomiting, which may happen if the tumor causes an obstruction.