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Doctor insights on: Colon Cancer Cat Scan

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Is it true that colon cancer can take years before causing symptoms? So a cat scan i had just a month ago showing nothing could be good news?

Is it true that colon cancer can take years before causing symptoms? So a cat scan i had just a month ago showing nothing could be good news?

Yes...: Colon and rectal cancer is usually a slowly growing tumor in the colon or rectum. From its earliest beginnings as a colon polyp its estimated to take 10-15 years to grow into a cancer. A standard ct scan of the abdomen/pelvis is not a good or accurate test for early detection of colon cancer. Colonoscopy is the best test for early detection of polyps or cancer in the rectum and colon. ...Read more

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Dr. Barry Rosen
4,287 doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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Can an ultra sound or a cat scan detect colon cancer?

Can an ultra sound or a cat scan detect colon cancer?

Other good tests: Early colon cancer is not easily visible on Ultrasound. CT scan is under trials to find out its utility. Right now the best test is Colonoscopy where it is easy to visuallise early colon cancer and precursor lesions. Ask your doctor in case you may need one done. it is recommended for all adults aged 50 years or earlier if there is a family history of colon cancer. Ask your doctor's advice. ...Read more

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Would a cat scan a month ago show advanced colon cancer? Been having weakness weight loss last few weeks and i hear you don't get symptoms till advnc

Would a cat scan a month ago show advanced colon  cancer? Been having weakness weight loss last few weeks and i hear you don't get symptoms till advnc

Depends: It depends on what you mean by advanced. If you mean spread to other organs, usually it will. If you mean advanced within the colon itself. Not unless it was really large. I've noticed that you seem to be asking a lot about colon cancer. If you have had a clear colonsocopy, you should be in the clear. ...Read more

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Hlthy 38yo guy-A lot blood on TP after straining to poop-dark poop-slight red water-anus painful. AB CAT scan in Aug ok. % of chance of colon cancer?

Hlthy 38yo guy-A lot blood on TP after straining to poop-dark poop-slight red water-anus painful. AB CAT scan in Aug ok. % of chance of colon cancer?

Hemorrhoids: Blood in stool probably bright red due to internal fissure or hemorrhoids. With previous exam and neg CAT scan one suspects rectal exam was neg and a very strong possibility no relationship to a tumor found. Proctoscopy should be performed and if neg. followed by colonoscopy to pinpoint nature of bleed. ...Read more

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Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years

Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years

Colon CA CT on show?: 41 F Asks: Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years. ANS: CT not so good for colon cancer detection. What are symptoms for 5 years? This would be unusual as colon CA usually does not cause symptoms other than bleeding or obstruction. Unless it is also in liver now. That should show up on CT eventually. ...Read more

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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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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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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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Does a CT scan detects colon cancer? Or colonoscopy should be done?

?Early detection tes: CT scan is not a good Test for early detection of Colon Cancer, so Colonoscopy is the preferred test because it accomplishes 2 objectives...detect polyps/precursors of colon cancer and remove them at the same time which eliminates the risk of Polyps changing into cancer. If you have difficulty with having Colonoscopy, then you should ask your doctor to suggest some alternative tests for checking. ...Read more

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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 Gabor
1,834 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


Colon (Definition)

The colon is another term for the large intestine. This is the final portion of the digestive system, responsible for absorbing water and storing stool before evacuation. It is divided into sections described as cecum; ascending, transverse, descending and ...Read more