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Doctor insights on: Virtual Colonoscopy Accuracy

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Dr. Charles Cattano
2,028 doctors shared insights

Colonoscopy (Definition)

Colonoscopy is the procedure of using a long flexible camera to visualize the entire colon from the inside with the option to take pictures, video, perform biopsies, remove polyps, etc. Generally people are sedated and do ...Read more


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

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

Imaging/biopsy: The imaging modality of ct scan could show findings that would be concerning for cancer, mass around your colon, enlarged lymph nodes in the same area. However, the diagnosis is made at biopsy, a piece of the mass under the microscope of a pathologist. Often the ct scan leads to the biopsy. Good luck, it is important to get the evaluation completed. ...Read more

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Would a colonoscopy detect IBS? Thanks!

Would a colonoscopy detect IBS? Thanks!

No, but...: A colonoscopy would help exclude other possible diagnoses that present with similar symptoms. It also serves as a screening test for colorectal cancer. So, useful for more than one reason. If you have a significant family history of colon cancer, it is recommended you have one starting at age 45-50, and then every 5 years after that, sometimes sooner if there are precancerous growths detected. ...Read more

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Health tap answer stated regular CT better for detecting inflammation & diverticulitis than CT colonography but will this still detect diverticulitis?

Health tap answer stated regular CT better for detecting inflammation & diverticulitis than CT colonography but will this still detect diverticulitis?

Diverticulitis: Yes a standard ct is the best modality for diagnosis during an acute attack and to classify the stage of disease colonography or colonoscopy can be considered many weeks after the acute attack has resolved. ...Read more

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Comparison of diagnosis colorectal cancer between ctscan and barium enema?

Comparison of diagnosis colorectal cancer between ctscan and barium enema?

Depends on size: Can see the blood supply of tumour mass on a cat scan.. But small polyps do not show... Be does not see polyps, but does see tumour.. Colonoscopy with a perfect prep is the gold standard for large and small. ...Read more

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Can i relax about cancer?Urq disc.& floating stool.Normal blood/stool tests, CT scan, colonoscopy, ultrasound and hida scan, endoscopy(gerd/gastritis).

Can i relax about cancer?Urq disc.& floating stool.Normal blood/stool tests, CT scan, colonoscopy, ultrasound and hida scan, endoscopy(gerd/gastritis).

Relax: If all of those tests were normal then you have much higher chances of being injured in a car accident than having an intestinal cancer. Eat a good diet, exercise regularly and enjoy life. ...Read more

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Can i relax about cancer?Urq disc.&occ floating stool.Normal blood/stool tests, CT scan, colonoscopy, ultrasound and hida scan, endoscopy=gerd/gastritis

Can i relax about cancer?Urq disc.&occ floating stool.Normal blood/stool tests, CT scan, colonoscopy, ultrasound and hida scan, endoscopy=gerd/gastritis

I'd relax for now: Your pain and stool fat changes sound like gall bladder disease, though proven not present. Was the gerd region biopsied? If so and negative, your comprehensive and perhaps more than appropriate workup shows within the limits of present technology, you don't have a detectable cancer. Longstanding gerd can be a pre-cancerous change over the years however and may warrant future follow-up endoscopy. ...Read more

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I had 14 BMs with blood since 7-25 & all tests come back neg. (stool, CT scan, X-ray, colonoscopy) GI assuming hemrroid? EDG appt in Oct/nov.

I had 14 BMs with blood since 7-25 & all tests come back neg. (stool, CT scan, X-ray, colonoscopy) GI assuming hemrroid? EDG appt in Oct/nov.

Blood: Bright red blood is usually from a hemorrhoid. Darker, thicker, jelly-like blood is usually from a source higher up, such as a bleeding diverticulum. ...Read more

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Im 34 w urq disc.&occ floating stool. Normal stool tests, CT scan, colonoscopy, u.S, hida scan, endoscopy=gerd/gast. Can i relax about pancreatic cancer?

Yes, you can : You mentioned nothing suspicious for pancreatic cancer. A normal ct scan is encouraging but is not 100% accurate. If there are suspicious symptoms or chances on a ct scan, a normal ca-19.9 (a blood test that is nearly specific for pancreatic cancer) would be reassuring. ...Read more

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Should i worry about pancreatic cancer?Urq disc.&occ floating stool. Normal stool tests, CT scan, colonoscopy, u.S., hida scan, endoscopy=gerd/gast. Im 34

Probably not: It appears that all test are normal except for the egd or endoscopy showing gastritis. Assuming normal blood workup as well, i would say that it is not likely that you have pancreatic cancer. My suggestion is that you sit down with your doctor and discuss all tests results and treatment plan. Good luck! ...Read more

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Colonscopy 2013 bright red rectal bleeding, diagnosis hemorrhoid . Appearing again & GI schedule colonscopy w/ anesthesia. suggesting incomplete last time?

Colonscopy 2013 bright red rectal bleeding, diagnosis hemorrhoid . Appearing again & GI schedule colonscopy w/ anesthesia. suggesting incomplete last time?

Not necessarily: There are many reason why this would be scheduled with general anesthesia. Talk to your GI Doctor, it may be different arrangements or requirements at the facility or the need for a longer exam. ...Read more

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Can normal CT scan, stool and blood tests, colonoscopy, gallblader us and hida scan, upper endoscopy (gerd, gastritis) rule out pancreatic cancer?

Only one of those : Most of those tests won't tell you anything about pancreas. Only one is ct scan.A perfectly normal ct with IV contrast goes a long way in saying you have a normal pancreas.Mri might give more info but not usually a screening test. ...Read more

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Can i relax about cancer?34yrold w urq disc.&floating stool.Normal blood/stool tests, CT scan, colonoscopy, ultrasound and hida scan, endo(gerd/gastritis

Why are you worrying: No great answer except that digestive symptoms are common at your age and related cancer is not. Most cancers do not cause your symptoms but some can affect digestion. What did your doctor tell you? You should ask a doctor who knows you. Maybe there is a specific reason you worry about cancer and not the usual causes of these symptoms? Do you need to be worried for some personal reason? ...Read more

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Can the virtual colonography/colonoscopy be done withOUT the bowel prep?

Can the virtual colonography/colonoscopy be done withOUT the bowel prep?

No: Virtual colonoscopy requires the same preparation as conventional procedure. Consult this site for more information on this topic. http://www.webmd.com/digestive-disorders/tc/virtual-colonoscopy-topic-overview ...Read more

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Is a CT scan dangerous to a 23 year old, (abdominal) virtual colonoscopy? How many standard x-rays equivelant roughly ?

Is a CT scan dangerous to a 23 year old, (abdominal) virtual colonoscopy? How many standard x-rays equivelant roughly ?

Does have some risks: Ct scans do expose you to a modest dose of radiation which is not harmful if you have good indications for doing this test and there is no better alternative. Virtual colonoscopy is not yet proven to replace standard colonoscopy. Moreover it is recommended only for over 50 years of age. Since you are 23 year old, you have to have a good reason to have virtual colonoscopy instead of regular exams. ...Read more

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Had colonscopy done, notes say small AC lesion near the cecum. Had CT scan, waiting for results. Biopsy was not done. Colonscopy 2013 was clear. Idea?

Had colonscopy done, notes say small AC lesion near the cecum. Had CT scan, waiting for results. Biopsy was not done. Colonscopy 2013 was clear. Idea?

Polypoid lesion: If on colonoscopy a small lesion noted in the ascending colon not seen previously I suspect a small polypoid growth noted. If base not on a stalk, bx might have been held off for possibility that bx could lead to performation. If small such lesions hard to define on scan. Best approach is to consider repeat colonoscopy in 4-4 mo. and bx performed if lesion larger. ...Read more

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Dr. Michael Puckett
46 doctors shared insights

Virtual Colonoscopy (Definition)

A virtual colonoscopy is a specialized abdominal ct scan. Using special software the abodminal ct images can be read for colon ...Read more