Bowel Cancer Diagnosis: Tests and Next Steps

Bowel cancer diagnosis usually involves several steps, including symptom assessment, physical examination, blood tests, stool tests, colonoscopy, biopsy and scans. These tests help doctors confirm whether cancer is present and understand how far it may have spread.

This article is for general information only. Your doctor or specialist team can explain your own test results and diagnosis.

How Bowel Cancer May Be Suspected

Bowel cancer may be suspected because of symptoms, an abnormal screening test, anaemia, family history or findings during another medical test. Common symptoms can include blood in the stool, persistent bowel changes, abdominal pain, weight loss or ongoing tiredness. :contentReference[oaicite:0]{index=0}

Colonoscopy and Biopsy

A colonoscopy allows doctors to look inside the colon and rectum. If an abnormal area is seen, a biopsy may be taken. A biopsy is important because it allows tissue to be examined under a microscope.

For more detail, read our Colonoscopy and Biopsy for Bowel Cancer article.

Scans for Staging

If cancer is diagnosed, scans such as CT, MRI or PET-CT may be used to help work out the stage and plan treatment.

For related information, visit our Further Tests After Bowel Cancer Diagnosis and Staging Bowel Cancer guides.

What Happens After Diagnosis?

After diagnosis, your case may be discussed by a team of specialists. They may consider surgery, chemotherapy, radiation therapy, targeted therapy, clinical trials or supportive care depending on the stage and your health.

For treatment planning, read our Making Treatment Decisions for Bowel Cancer article.

Questions to Ask

• What type of bowel cancer do I have?
• Is it in the colon or rectum?
• What stage is it?
• Has it spread?
• What treatment options are available?
• When will treatment start?

Final Thoughts

A bowel cancer diagnosis can feel overwhelming, but understanding the tests and next steps may help you feel more prepared. Ask your healthcare team to explain results clearly and repeat information when needed.