| SYMPTOMS
- Changes in bowel movements, including persistent constipation or diarrhea, feeling of not being able to empty the bowel completely, or rectal bleeding.
- Dark patches of blood in or on stool; or long, thin, "pencil stools."
- Stomach discomfort, intermittent cramps, frequent gas pains, heartburn, nausea, vomiting, bloating, or difficulty swallowing.
- Unexplained fatigue, or loss of appetite or weight.
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