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Doctor insights on: What Does Colon Cancer Look Like On Ct Scan

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Dr. Mark Pack
Board Certified, General Surgery
25 years in practice
2M people helped
1

1
My CT scan said my bowel is unremarkable. Could something be wrong with my colon? Like colon cancer? Even if my CT said my bowel is normal.

My CT scan said my bowel is unremarkable. Could something be wrong with my colon? Like colon cancer? Even if my CT said my bowel is normal.

Unlikely: Given your age it is unlikely. Depending on your symptoms, it could be possible that you may need further evaluation. CT scan are not perfect. What are you worried about? Are you having problems? Why did you have a CT anyway? ...Read more

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Dr. Aaron Milstone
Board Certified
21 years in practice
1M people helped
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Dr. Janice Alexander
1 doctor shared a insight

Computed Tomography (Definition)

Computed tomography is also known as CT scan. Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


Dr. Allen Kamrava
Board Certified, Colon and Rectal Surgery
9 years in practice
889K people helped
2

2
Why can't a CT scan see colon cancer well? How large would it need to be to be seen?

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

Not Designed for it: 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. ...Read more

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Dr. Aaron Milstone
Board Certified
21 years in practice
1M people helped
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Dr. Enrique Molina
Board Certified, Gastroenterology
29 years in practice
483K people helped
3

3
Can colon cancer be detected on a CT scan?

Can colon cancer be detected on a CT scan?

Yes: however usually advanced colon cancers are the ones that can be picked up. Virtual CT colonography is an improved image, however the best way to definitely diagnose colon cancer is with a regular colonoscopy. let me know if you have further questions ...Read more

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Dr. Joshua Lawson
Board Certified, Radiation Oncology
1M people helped
4

4
Can a CT scan see stage 2 colon cancer?

Sometimes: 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. ...Read more

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Dr. Aaron Milstone
Board Certified
21 years in practice
1M people helped
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Dr. George T Tsai
Board Certified, General Surgery
21 years in practice
861K people helped
5

5
Can I be screened for colon cancer with a CT scan instead of a colonoscopy?

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

Sometimes: 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. ...Read more

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Dr. Michael Murray
Board Certified, General Surgery
27 years in practice
274K people helped
6

6
How reliable is a ab CT scan for colon cancer? Had 3, what percentage of cancers are missed in a CT scan? Trying to find stats.

How reliable is a ab CT scan for colon cancer? Had 3, what percentage of cancers are missed in a CT scan? Trying to find stats.

Colon cancer: A ct scan is not the diagnostic modality of choice to find colon cancer. It may find late cancers that are causing symptoms but if you want to find colon cancer or precancerous polyps you need a colonoscopy. ...Read more

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Dr. Addagada Rao
Board Certified, General Surgery
50 years in practice
25M people helped
7

7
How often should I have CT scan after colon cancer surgery for the first year?

How often should I have CT scan after colon cancer surgery for the first year?

Depends on stage: Depends on need for it , by clinical examination, blood tests , cea levels, to detect metastasis pet scan is a much better tool. ...Read more

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Dr. Herman Hammerstead
Board Certified, Trauma Surgery
44 years in practice
922K people helped
8

8
Can Diveticulosis (not itis) be mistaken for colon cancer on CT scan? Had sigmoidoscopy to 35 CM and 4 CT scans over past three years.

Can Diveticulosis (not itis) be mistaken for colon cancer on CT scan?  Had sigmoidoscopy to 35 CM and 4 CT scans over past three years.

NO: Both CA and tics have different morphology. That said, it doesn't mean a small cancer can go undetected in an area of tics. Colonoscopy is the gold standard. Why so many CTs ??? ...Read more

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Dr. Michael Puckett
Board Certified, Radiology
28 years in practice
3K people helped
9

9
Would advanced colon cancer show up on a CT scan of my abdomen ? Reg CT scan not virtual colonoscopy.

Likely not.: On occasion you can see a mass in the colon, but a mass is usually obscured by stool or collapsed bowel. ...Read more

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Dr. Chad Levitt
Board Certified, Radiation Oncology
16 years in practice
1M people helped
10

10
Ct scan showed spot on liver, have colon cancer but ultrasound came back negative does it mean it was wrong?

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: 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. ...Read more

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Dr. Michael Korona
1,690 doctors shared insights

Ct Scan (Definition)

Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more


Dr. Eric Kaplan
878 doctors shared insights

Colon Cancer (Definition)

Final few yards of your intestine, between the terminal ileum (small bowell) and rectum. It squeezes water and solidifies waste to stool. It is subject to outpouching (divertics) polyps, and these can become cancers. The cells are abnormal, invade into the muscle and travel ...Read more


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Dr. Aaron Milstone
Board Certified,
21 years in practice
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