what does colon cancer look like on ct scan

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Can a ct scan see stage 2 colon cancer?

Sometimes

Colon
CT imaging can show abnormalities in the colon, but the best test is colonoscopy. This gives a doctor the chance to directly visualize the colon and also biopsy anything suspicious.
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Dr. Allyson Ocean answered:

Can an abdominal ct scan find colon cancer?

Check out website

Colorectal_cancer
Sometimes a CT scan can pick it up but a colonoscopy is the best initial test. Please check out www.michaelsmission.org it is a very informative website about colorectal cancer.
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Dr. Michael Korona answered:

Would colon cancer show up in a abdominal CT scan ?

Sometimes

Cancer
on regular ct. Seen better on ct colonography. See radiologyinfo.org
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Dr. George T Tsai answered:

Can I be screened for colon cancer with a CT scan instead of a colonoscopy?

Sometimes

Cancer
CT colography is never meant to replace a colonoscopy. At high volumn centers, the detection sensitivity of CT exam is indeed comparable to colonoscopy but you need to know the rate of detection of your imaging facility. Bowel prep is required for both procedures - no way around the unpleasant process. Beware that there is significant radiation exposure with the exam.
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How often should I have ct scan after colon cancer surgery for the first year?

Depends on stage

Pet_scan
Depends on need for it , by clinical examination, blood tests , CEA levels, to detect metastasis PET scan is a much better tool.
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Dr. Allen Kamrava answered:

Why can't a ct scan see colon cancer well? How large would it need to be to be seen?

Not Designed for it

Colon
Not what a CT Scan is designed to do. Usually colon cancer will not be clearly evident on CT until it is at Stage III or Stage IV level, since it has to anatomically change the colon to be evident on CT. To get that level of change, it needs to be at minimum a locally advanced tumor. Every once in a while it may be evident at the stage II point, but very low sensitivity.
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Can a CT Scan of the abdomen/pelvis without contrast detect colon cancer and ulcers?

CT Scan Findings

Colonic
CT scan is not the best study to detect colon cancer or ulcers. Although a CT scan may show a large sized colon cancer, the sensitivity of this is greatly reduced without the administration of oral contrast. Ulcers are typically not seen on CT scan. The best diagnostic study for both of these would be an endoscopy and colonoscopy.
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Would advanced colon cancer show up on a ct scan of my abdomen ? Reg ct scan not virtual colonoscopy.

Likely not.

Ct_scan
On occasion you can see a mass in the colon, but a mass is usually obscured by stool or collapsed bowel.
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Dr. Gurmukh Singh answered:

Had surgery for colon cancer no chemo, after 4 months ct scan showed spot on liver. Could it be cancer?

Possible

Cat_scan
You seem too young to have had colon cancer, unless you have a genetic predisposition. If you did have surgery for colon cancer, a spot on the liver has be considered cancer, unless it can be proven otherwise with a biopsy.
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Dr. Chad Levitt answered:

Ct scan showed spot on liver, have colon cancer but ultrasound came back negative does it mean it was wrong?

Pet or MRI may help

Computed_tomography
Other imaging modalities may help further clarify if this finding in ct is suspicious for malignancy or more likely benign if the ct and ultrasound have not been more specific. If u have older ct scans to compare and this is indeed new, then further clarification is needed. This all has to be taken into context of the bigger clinical picture including cea as well as the rest of your body.
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