Colorectal Cancer Health Center
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Dogs Can Detect Early Colorectal Cancer
Specially trained dogs may be able to sniff out early signs of colorectal cancer in breath or stool samples, according to a new study.
Specially trained dogs may be able to sniff out early signs of colorectal cancer in breath or stool samples, according to a new study.
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Understanding Colorectal Cancer -- Symptoms
What Are the Symptoms of Colorectal Cancer?
In its early stage, colorectal cancer usually produces no symptoms. The most likely warning signs include:
- Changes in bowel movements, including persistent constipation or diarrhea, a feeling of not being able to empty the bowel completely, an urgency to move the bowels, rectal cramping, or rectal bleeding
- Dark patches of blood in or on stool; or long, thin, "pencil stools"
- Abdominal discomfort or bloating
- Unexplained fatigue, loss of appetite, and/or weight loss
- Pelvic pain, which occurs at later stages of the disease