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Doctor insights on: Pet Scan Colon Cancer Colonoscopy

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Dr. Barry Rosen
4,308 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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Could I have a pet scan to check for colon cancer instead of having a colonoscopy?

Could I have a pet scan to check for colon cancer instead of having a colonoscopy?

I agree, No: Pet-ct scans are typically used after a diagnosis of cancer to look for other spread of the tumor. If you are looking for an alternative to routine colonoscopy, ct-colonography or virtual colonoscopy is an option. This still involves a bowel prep but requires no sedation. If something is found, you may still need a colonoscopy. Insurance companies are not quite on-board paying for this as yet. ...Read more

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How soon after colon cancer resection should I have a pet scan?

How soon after colon cancer resection should I have a pet scan?

Do u need one?: Not every patient who's had colon cancer (or any other cancer, for that matter) needs routine ct or pet scans. It depends a lot on the stage of the cancer and any other factor that would make your doc concerned about spread. This is a great question that would be best answered by the doc who knows your situation the best. I wish you success. ...Read more

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Is a metastic 10mm node which lit up on a pet scan regarded as large in a colon cancer person ?

Is a metastic 10mm node which lit up on a pet scan regarded as large in a colon cancer person ?

It depends.: It's not the size of a metastatic nodule that matters, but where it is located. If it is located adjacent to the actual tumor, it means something different then it does if it is located in a distant organ, such as the liver or lungs. Your doctor should go over the results of the pet scan in detail with you. Good luck. ...Read more

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Can colon cancer spread to a aortocaval node ? This was note few months after surgery by a pet scan .

Can colon cancer spread to a aortocaval node ? This was note few months after surgery by a pet scan .

Yes: Colon cancer can indeed spread to that lymph node, as well as to others. Also, PET scans can give false positive results. Confer with your doctor. ...Read more

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My husband had colon cancer, had a colon resection and chemo. He has had 2 pet scans since. Churining?

My husband had colon cancer, had a colon resection and chemo. He has had 2 pet scans since. Churining?

A PET scan is: The most expensive imaging test. Using it to routine follow up can be justified if it alters care. Usually there is a defined course (# of cycles) and re-staging is done regularly with ct scans. Many insurers engage "pre-approval" screening to prevent over use. There are second and third line treatments for recurrent colon cancer, but ct scans do a good job of picking this up. ...Read more

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What can this mean... Indeterminate uptake in the medistinial/ hilar nodes in a colon cancer pt ? This was noted from a pet scan . Can it mean mets ?

What can this mean... Indeterminate uptake in the medistinial/ hilar nodes in a colon cancer pt ? This was noted from a pet scan . Can it mean mets ?

Indeterminate: Metastatic cancer causes increased metabolic activity in lymph nodes. Inflammation and othe conditions can also do that, but not as much. Indeterminate uptake means that the uptake is more than normal, but not so high as to make cancer virtually certain. The uptake is in the range where it could be cancer, but is more likely non-cancer. Hence, indeterminate. ...Read more

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If a pet scan showed a liver met and a node in October for a person with colon cancer , on chemo, can the january scan show further mets?

If a pet scan showed a liver met and a node in October for a person with colon cancer , on chemo, can the january scan show further mets?

Hopefully not: As with any cancer, progression of disease is always possible and the purpose of surveillance imaging is to assess for the effectiveness of the treatment. Hopefully, the next scans will show improvements and not additional mets as the chemotherapy impact has begun. ...Read more

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Psych? Colon cancer 1/09 stage III surg. & chemo. Tiny liver met 2/12 stage iva liver resection. Horrible anxiety & h a. Pet scan in 2 wks. prescription .5mg clonezapam 2x's day. Fear ca's return. How to cope?

Psych? Colon cancer 1/09 stage III surg. & chemo. Tiny liver met 2/12 stage iva liver resection. Horrible anxiety & h a. Pet scan in 2 wks. prescription .5mg clonezapam 2x's day. Fear ca's return. How to cope?

Colon cancer: Confronting ones own mortality and living with a cancer that can and often recurs causes tremendous anxiety and depression. You are not alone. Unfortunately, many wonderful, talented, and smart people are confronting the same fate. Look into support groups and treatment with a psychiatrist to help you cope with this detour in life. ...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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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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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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If 61 yr m had a -ve whole body pet+ct done for renal mets 1 yr ago, how long we can postpone colonoscopy (first time)screening for colon cancer?

Let me be: Sure i understand. She had a renal cancer removed, and that was more than a year ago, and pet showed no metastasis. She is asymptomatic and feeling well? There are advisories that colonoscopy should be done once each decade after 50. She would seem eligible for that, but there is no rush. ...Read more

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Chance of developing colon cancer 20 months after colonoscopy removal 5mm polyp removed. Having ct scan with and without contrast for left quad pain ?

Chance of developing colon cancer 20 months after colonoscopy removal 5mm polyp removed. Having ct scan with and without contrast for left quad pain
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See below: If the colonoscopy was done properly, you are very unlikely to have colon cancer 20 months after the procedure. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. ...Read more

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I had a colonoscopy 17 months ago could the symptoms previously mentioned still be colon cancer?

I had a colonoscopy 17 months ago could the symptoms previously mentioned still be colon cancer?

unlikely Dx: Some times possible but only 17 months ago you had scope , you have an attack of diverticulits . See your doctor for examination , reevaluation and possible rx of antibiotics , if perforates will be a surgical emergency ...Read more

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Do all polyps need to be removed in colonoscopy to avoid colon cancer?

Do all polyps need to be removed in colonoscopy to avoid colon cancer?

Yes: Not all polyps are pre-canerous, most are. The determination of whether the polyp is precancerous or not usually requires examination by a pathologist and that necessitates removal. There is no good reason to not remove a polyp detected on colonscopy. All most all colon cancers start in polyps, therefore it is necessary to remove polyps to prevent colon cancer. ...Read more

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Do colonoscopies screen for colon cancer?

Yes.: That is one of the main reasons for colonoscopy. The gastroenterologist usually can see every part of the colon wall and biopsy suspicious lesions. Often this is curative if found early. While not completely true, consider all polyps to be future cancers and most cancers come from polyps. Screening should begin at age 50 unless there is a history to suggest beginning earlier. ...Read more

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20 mm polyp removed during colonoscopy. Likelihood of cancer. Family history of colon cancer.

20 mm polyp removed during colonoscopy. Likelihood of cancer. Family history of colon cancer.

Need more: Information. The type of polyp.who in your family has colon CA, the age of diagnosis and your age ...Read more

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My Dad was diagnosed with Stage 3 colon cancer at age 54. When should I get my first colonoscopy?

My Dad was diagnosed with Stage 3 colon cancer at age 54. When should I get my first colonoscopy?

At about 44 years: The general rule is to get a colonoscopy about 10 years before the age a relative developed colon cancer. You may wish to monitor occult blood in stool with a FIT test. It would be prudent to discuss these issues with your doctor. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. ...Read more

Dr. Guido Davidzon
291 doctors shared insights

Pet Scan (Definition)

Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more


Dr. Ira Katz
13 doctors shared insights

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