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Doctor insights on: Colon Cancer On Ct With Oral Contrast

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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

Dr. Barry Rosen
4,351 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 a CT on abdomen with contrast show colon cancer if there are present symtoms?

Can a CT on abdomen with contrast show colon cancer if there are present symtoms?

Not always: Unless the cancer lesion is fairly large, colon cancer is not commonly seen on a ct scan. Colonoscopy is the best test for colon cancer. Some places have the ability to perform a specialized ct colonography x-ray exam that may see lesions about 1 cm or larger. ...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?

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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Can a CT with contrast of abdomen and pelvis detect colon cancer?

Can a CT with contrast of abdomen and pelvis detect colon cancer?

It can sometimes: Unfortunately, ct scans are not very good at finding small polyps like a colonoscopy does. The scan will usually only pick up larger lesions. The endoscopy has an additional benefit of allowing small polyps to be biopsied or removed. Polyps tend to grow to become cancer, so they should be removed if possible. Ct scan, won't allow treatment at same time, and thus, is not as good a test for colon ca. ...Read more

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Can a CT scan of the abdomen/pelvis without contrast detect colon cancer and ulcers?

Can a CT scan of the abdomen/pelvis without contrast detect colon cancer and ulcers?

CT Scan Findings: Ct scan is not the best study to detect colon cancer or ulcers. Although a ct scan may show a large sized colon cancer, the sensitivity of this is greatly reduced without the administration of oral contrast. Ulcers are typically not seen on ct scan. The best diagnostic study for both of these would be an endoscopy and colonoscopy. ...Read more

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A recent CT scan with contrast revealed two cysts on pancreas. What does this mean? Previous colon cancer and has esld. Also 6mm mass on liver.

A recent CT scan with contrast revealed two cysts on pancreas. What does this mean? Previous colon cancer and has esld. Also 6mm mass on liver.

Needs attention: Needs work up. Most of the pancreatic tumors are solid but cysadenoma, cystadeno carcinoma will present as cystic lesions need biopsy of these lesions to make sure they are not malignant also liver lesion. If pancreatic lesions are benign could be a candidate for liver transplantation for end stage liver disease (esld). ...Read more

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Can diverticulosis (not itis) be mistaken for colon cancer on CT scan? PCP says no. No referal for other tests.

Can diverticulosis (not itis) be mistaken for colon cancer on CT scan? PCP says no. No referal for other tests.

Possible but rare: Yes diverticulosis is benign, has distinct appearance from CA on CT for a trained radiologist will read as accurate as reading finger prints, some times in between diverticula the wall may be thickened, may have mucosal overgrowth will mimic a early cancer, then colonoscopy indicated, at 39 cancer is not common but age is not exception for CA, ask again for referral. ...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?

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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Do CT scans pick up early stages OR stages of ovarian cancer and colon cancer?

Do CT scans pick up early stages OR stages of ovarian cancer and colon cancer?

Yes/No: For early detection of Cancer, there are well defined screening guidelines which your primary care physician can share with you and guide you. For Colon cancer CT scan is not a good screening test. Instead Colonoscopy is the best test, but it is to be done> 40 years of age unless you have any symptoms like rectal bleeding or abdominal pain. Best thing you can do is to have an annual Physical exam. ...Read more

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She is 59sept end 2013 we came to know tht she is having colon cancer stage 3.Then 6cchemos were given n in CT no improvement. Cetuximab goi survival?

She is 59sept end 2013 we came to know tht she is having colon cancer stage 3.Then 6cchemos were given n in CT no improvement. Cetuximab goi survival?

Be patient: Colon cancer is a preventable disease and the only treatment for it is surgery chemotherapy can help when the cancer is spread but containing the cancer is the key
simply be patient and follow the doctor instruction and pray for the best. ...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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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

Dr. John To Dr. To
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2 new nodules on a CT report on a colon cancer patient, why are not measurements stated?

Dr. John To Dr. To
1 doctor agreed:
2 new nodules on a CT report on a colon cancer patient, why are not measurements stated?

Complicated: Measurement of lesions at CT is not a trivial task. Measurement in the axial plane in two dimensions may not reflect the volume of the lesion. The measurement is affected by slice thickness and window and level settings. RECIST 1.1 is a standard for tumor measurement, but it seems outdated with modern CT. Development of new lung lesions in high risk colon ca is bad, size willnot affect therapy. ...Read more

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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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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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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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How fast does colon cancer grow. CT Scans 2 1/2 years apart both negative. Would there have been some change by this point? Pcp says IBS.

How fast does colon cancer grow. CT Scans 2 1/2 years apart both negative. Would there have been some change by this point? Pcp says IBS.

It depend: First CT scan is not the best way to discover or screen or rule out colon cancer so negative CT scan does not mean anything as far as colon cancer concern colonoscopy is the best way to screen colon cancer
you are kind of young for colon cancer most likely your colon problems are caused by something else like IBS
good luck
thank you for using health tap ...Read more

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How likely is colon cancer in 31 year old? Doc said if CT Normal for RUQ pain then colonoscopy next. Is this necessary? No other symptoms

How likely is colon cancer in 31 year old? Doc said if CT Normal for RUQ pain then colonoscopy next. Is this necessary? No other symptoms

Perhaps not?: Generally speaking, a 31 year old patient with RUQ pain is unlikely to need a colonoscopy, especially if a CT is normal. It would be rare indeed for colon cancer to be causing these symptoms at your age. I assume you've had a normal abdominal ultrasound. If you haven't had an ultrasound that would be the first test to do before a CT. An online consultation at Health Tap might be helpful. ...Read more

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Colon cancer pt. Old ct- nodule on left adrenal gland. (was not met). New ct- new adrenal nodule. Are these the same or diffetent ones, ?

Must compare CT's: The best way to tell if these are the same nodule or if this is a new nodule would be to have the radiologist or your oncologist compare the CT's side-by-side. It may be obvious that they are or are not the same nodule. If it is not obvious, then further testing may be necessary, perhaps even a biopsy of the nodule if it is worrisome. Good luck. ...Read more

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Chance that 4 CT scans over 2 1/2 years would all miss sympotomatic colon cancer (narrow stool, occasion blood), also sigmoidscope to 35 cm.

Fairly high risk: CT scans are NOT good tools for looking inside the bowel. Endoscopy is the preferred tool, but a sigmoidoscopy, at its best, misses looking at half the colon. A look to merely 35 cm has missed about 85-90% of the colon. The usual method to evaluate the colon is a complete colonoscopy. ...Read more

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Why would a oncologist say "possible" peritoneal disease in a person with metastic colon cancer but the ct report has no Mention of peritonial?

Why would a oncologist say "possible" peritoneal disease in a person with metastic colon cancer but the ct report has no Mention of peritonial?

Not inconsistent: Peritoneal disease from metastatic colon cancer may affect the peritoneal lining in a thin layer, too thin for the resolution of a CT scan. In other words the CT may not be able to detect peritoneal disease. ...Read more

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Would symptomatic colon cancer be missed on 3 separate CT scans? I am only 37 but have had narrow stools and small amounts of blood for past year.

Unlikely: Best test would be a colonoscopy for your symptoms or at least a sigmoidoscopy. Usually if a colon cancer had symptoms a year ago those symptoms would have progressed over the ensuing 12 months and by now it would have been obvious by your symptoms and ct scan. ...Read more

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Is it normal for 27 yr old f to have diverticular disease? CT shows several diverticular and remarkably thickened bowel. Could it also be colon Cancer

Is it normal for 27 yr old f to have diverticular disease? CT shows several diverticular and remarkably thickened bowel. Could it also be colon Cancer

Could be: Diverticular disease is seen in older patients ie over 60, but I have seen it in younger people. One of the theories on why people get diverticuli, or tiny pouches, in the colon, is the low fiber, high fat diet in the U.S. There may also be an inherited aspect. Thickened wall of the colon and diverticuli aren't associated with cancer, but it's reasonable to get a colonoscopy--talk to your doctor. ...Read more

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Can a ct scan detect liver failure in metastic colon cancer?

Can a ct scan detect liver failure in metastic colon cancer?

No: A CAT scan is used to visually define the extent of metastatic colon cancer in the liver should metastasis be present. Liver failure is a condition measured by functional abnormalities that occur within the liver usually due to parenchymal damage such as inflammation from hepatitis. Here one measures serum enzymes and the presence of elevated alkaline phosphatase and bilirubin in serum. ...Read more

Dr. Linda Callaghan
1 Doctor shared a insight

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


Dr. Andrew Berry
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