A 49-year-old member asked:
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does a pet ct scan replace a colonoscopy?

3 doctor answers
Dr. Mary Maluccio
26 years experience Surgical Oncology
No: Depending on what you are getting the pet scan for, they are more or less sensitive. If the pet is being done as surveillance or colon cancer, it is good for picking up recurrent disease, but will not pick up new polyps within the colon. You would still need the colonoscopy.
Answered on Mar 23, 2015
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Dr. Steven Chmielewski
29 years experience Diagnostic Radiology
NO!: Pet/ct is an excellent tool for cancer diagnosis and evaluation of therapy, but it does not actually 'look' at the lining of the colon. Often we see activity in the bowel that has been secreted, so it could mask or mimic a tumor.
Answered on Jan 5, 2019
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1 thank
Dr. Brian Wosnitzer
17 years experience Nuclear Medicine
No...: There is often diffuse physiologic tracer uptake in the bowel on pet/ct. More focal tracer uptake can often be seen in the ileocecal region in normal patients. Focal uptake on FDG pet often raises the suspicion for malignancy but may also be benign. Correlation with the ct portion of the scan is very helpful. Colonoscopy allows the advantage of biopsy or removal of suspicious lesions.
Answered on Jun 25, 2014

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