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Doctor insights on: Difference Between Ct Scan And Colonoscopy

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Gastro recommended CT and colonscopy for mild abdominal pain/gas. 23 yrs old. If CT scan shows nothing, is colonoscopy necessary? no bloody stools

Gastro recommended CT and colonscopy for mild abdominal pain/gas. 23 yrs old. If CT scan shows nothing, is colonoscopy necessary? no bloody stools

Options available: CT scan of the abdomen may be indicated but not for mild pain alone. If the symptoms are progressive and there is concern for Cancer(unlikely in your age group), then only I would consider doing a CT. Similarly Colonoscopy is not indicated because of pain alone.If there is bowel irregularity or blood in stool Colonoscopy is reasonable to do. In your case I would watch /monitor for 4-6 weeks, then ...Read more

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Dr. Steven Griggs
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Computed Tomography (Definition)

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


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What is the difference in diagnostics between mri, cat scan and colonoscopy? Which one is best for identifying problems?

What is the difference in diagnostics between mri, cat scan and colonoscopy?  Which one is best for identifying problems?

Depends: Mri and ct scans are noninvasive imaging techniques. They have their own inherent advantages and disadvantages, and to compare them would be too complicated here. Colonoscopy is invasive, where a camera is extended via the rectum into the colon to see what the inside of the colon looks like, usually for cancer screening. ...Read more

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Does a pet CT scan replace a colonoscopy?

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. ...Read more

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If I have been diagnosed with diverticulitis by CT scan do I need a colonoscopy?

Possibly: It depends some on your age and past history. Diverticulitis, an infection of the colon, can sometimes show a lot of thickening on ct scan. That can be hard to tell if the infection caused the swelling, or if a tumor is causing the thickening. It is common to recommend a colonoscopy several weeks after the diverticulitis had healed, if you have not already had one. ...Read more

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Why would I have to have a colonoscopy after being diagnosed with diverticulitis via CT scan?

Possibly: It depends some on your age and past history. Diverticulitis, an infection of the colon, can sometimes show a lot of thickening on ct scan. That can be hard to tell if the infection caused the swelling, or if a tumor is causing the thickening. It is common to recommend a colonoscopy several weeks after the diverticulitis had healed, if you have not already had one. ...Read more

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What is method to diagnose intestinal tb if colonoscopy and endoscopy and ct scan normal?

What is method to diagnose intestinal tb if colonoscopy and endoscopy and ct scan normal?

Start with : A skin test. If this is negative then TB is quite unlikely. You may react positive though if you've been vaccinated or been sensitized from previous contact. A blood test like the interferon gamma release, unfortunately suffers from similar problems like the skin test. Usually TB enteritis has some radiographic or endoscopic findings. Otherwise all that's left is to empirically treat you ... ...Read more

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Prominent Spleen was found during a Colonoscopy exam, CT scan (2 weeks later) showed the Spleen was normal - is any further investigation required?

Probably not : The spleen is not actually "seen" directly on colonoscopy. If the CT scan showed a normal size spleen and your doctor has no other reason to suspect an abnormal spleen, then no further tests should be necessary. ...Read more

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Had Abd/Pelv CT Scan in Sept'13.Had Abd/PelvMRI in Nov'13.Had Colonoscopy Oct'13.Had numerous hem/anal checks.Doc says no AnalCancer.Still reason2wry?

Had Abd/Pelv CT Scan in Sept'13.Had Abd/PelvMRI in Nov'13.Had Colonoscopy Oct'13.Had numerous hem/anal checks.Doc says no AnalCancer.Still reason2wry?

Why so worried? : It sounds like you have already undergone an extensive evaluation. Rectal and colon cancer are very rare at your age. Typically, a flexible sigmoidoscopy is sufficient in your age group. Given your young age, and extensive studies, I think your risk is low. Are there other symptoms or lifestyle choices that make you worry about anal disease? ...Read more

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

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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Dr. Michael Korona
1,787 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. Charles Cattano
1,988 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