Potentials of high resolution magnetic resonance imaging versus computed tomography for preoperative local staging of colon cancer. If your colorectal cancer has not spread, a PET-CT scan is usually not helpful. The new findings indicate that MRI colonography can accurately detect polyps that have the potential for becoming cancerous. These tests also allow for greater soft-tissue contrast than a CT scan. Reporting colon cancer staging using a template. AJR Am J Roentgenol. Background: Main outcome measures: You can find certain types of cancer without a biopsy. Thank you. No bowel cleansing agents were given, although rectal water enema was administered during imaging to expand the bowel. CT Colonography in Preoperative Staging of Colon Cancer: Evaluation of FOxTROT Inclusion Criteria for Neoadjuvant Therapy. The positive predictive value—meaning a test correctly detects cancer when it is present—was 17% for recalls for additional testing and 26% for breast biopsy. While the results are encouraging, the researchers believe that conventional colonoscopy will remain the first choice screening method for colon cancer. 1997 Mar;35(2):457-85. Patients: By contrast, MRI colonography nearly always missed smaller polyps. One test is not harmful, but radiation builds up if you are exposed many times. Nerad E, Lahaye MJ, Maas M, Nelemans P, Bakers FC, Beets GL, Beets-Tan RG. Several screening tests have been developed to help doctors find colorectal cancer before symptoms begin, when it may be more treatable. MRI has shown high specificity and moderate sensitivity and could be a good option to detect extramural venous invasion among colorectal cancer patients, especially with high-resolution MRI technology. Colon cancer: Virtual MRI or CT scan of the colon can detect polyp or mass but it can not diagnose cancer until a colonoscopy with biopsy is done. Interobserver agreements were predominantly good; the more experienced reader achieved better results in the majority of these categories. 2020 Jan 29;7:100213. doi: 10.1016/j.ejro.2020.01.002. Last month they check it was 11 and he got 11 again this month, so no improvement or worssening. MRI scans help detect abnormalities in organs, blood vessels, and other tissues. Hi Girls, me again. Finding colon cancer at its earliest stage provides the greatest chance for a cure. MRI has a good sensitivity for tumor invasion through the bowel wall, extramural vascular invasion, and serosal involvement. This dye can be injected into a patient’s vein or given as a pill or liquid to swallow. Thank you. Just as we discussed in our previous post CT Scan detect stomach cancer, You may click it since our focus post is same. The role of multidetector CT in local staging and evaluation of retroperitoneal surgical margin involvement in colon cancer. Once the scan is finished you can go home. But MRI uses strong magnets to make the images – not radiation. Many colon cancers can be treated with a relatively common surgical procedure that is performed using an incision no larger than 3 inches. Diffusion-Weighted Imaging in Oncology: An Update. Some tests that detect adenomas and polyps can prevent the development of cancer because these tests allow growths that might otherwise become cancer to be detected and removed.  |  This test may be used to determine whether the colorectal cancer has spread to lymph nodes or other areas of the body, such as the liver or lungs. But I know these aren't used to find colon cancer. Please enable it to take advantage of the complete set of features! The findings on MRI colonography were compared with those obtained with conventional colonoscopy. They give off more radiation than CT scans, due to the tracer.  |  Tracked over time, the level of CEA in your blood may help your doctor understand your prognosis and whether your … Missymuffet . It can detect abnormal tissues, growths, and cysts and give a suspicion of cancer based on how those images look. If you have cancer of the back passage (rectum) your doctor may do this test with an endo anal coil. Optimal (local) staging of colon cancer could become crucial in selecting patients for neoadjuvant treatment in the near future (Fluoropyrimidine Oxaliplatin and Targeted Receptor Preoperative Therapy trial). However, improvements are needed to … Over time some of these polyps can become colon cancers.Polyps may be small and produce few, if any, symptoms. Are there any blood markers that indicate colon cancer? DEAR DR. ROACH: I am a 74-year-old … 6 posts / 0 new . With the advent of preoperati… In total, 55 patients with biopsy-proven colon carcinoma were included. However, the primary comparison was between PET/CT and PET/MRI… Epub 2013 Apr 30. Screening has been shown to reduce your risk of dying of colon cancer.Doctors generally recommend that people with an average risk of colon cancer begin screening around ag… I am trying to find out if MRI scans can be used to detect bowel and colon problems, basically things such as ulcers, as I have had no less than four proctograms in my past history and a colonoscopy and a sigmoid, they are uncomfortable, unpleasant and the results were not conclusive even though a 'hands on' under anathetic established I had a fully prolapsed bowel that needed immediate surgery. These findings are from a study of 315 adults older than 50 years who underwent MRI colonography screening. NLM A standard x-ray works best on bone and other dense tissues, and is good for detecting bone cancers or tumors in the lungs. National Center for Biotechnology Information, Unable to load your collection due to an error, Unable to load your delegates due to an error. Rectal Cancer MR staging Rhiannon van Loenhout, Frank Zijta, Max Lahaye, Regina Beets-Tan and Robin Smithuis ... Ref: Colon and Rectum Cancer Staging- quick reference (AJCC) This figure illustrates the T-stage and mesorectal fascia involvement in the axial plane, which is usually the best imaging plane for the T-staging. Colonoscopy is best known for its use as a screening tool for the early detection of colorectal cancer. Conclusions: This dye can be injected into a patient’s vein or given as a pill or liquid to swallow. He has had blood in his stools but the doctor had tests done on the stool and he says that it was probably hemorroids. An MRI Pedersen MRV, Dam C, Loft M, Rafaelsen SR. Eur J Radiol Open. Since CT Scan lab result is clearer and more detailed than X-ray examination. Colorectal cancer is second most common malignancy worldwide representing fourth commonest cause of cancer-related mortality [1]. CT scan result colon cancer staging. Author has 406 answers and 43.8K answer views Signs of early stage colon cancer can be found through tests such as a barium enema, CT colonography, stool tests, sigmoidoscopy, and colonoscopy. Our Standards: The Thomson Reuters Trust Principles. Two days before screening, the subjects drank a liquid that “tagged” any stool in the bowel, allowing the stool to be virtually removed from the colonographic images to makes it easier for doctors to look for polyps. Epub 2020 Aug 2. Not all types of cancer can be detected through PET scans, such as Breast Cancer, etc. All quotes delayed a minimum of 15 minutes. Early cancer treatments can also be less expensive and complicated than more advanced disease treatments, which may spare you and your family heartaches. Histopathology after resection was the reference standard. An MRI is a painless test. MSI and MMR testing: Colorectal cancer cells are typically tested to see if they show high levels of gene changes called microsatellite instability (MSI). Colon cancer. In other words, more than 80% of women called back for more testing and nearly three quarters of those who underwent biopsies … Oncol Lett. Cancers (Basel). There are a few different ways to do this, depending on the type of cancer you have and how much it has grown. let me know if you have further questions But to actually diagnose colon cancer, you need a biopsy - this is generally done during colonoscopy. Advanced x-ray machines, like the CT scan or mammogram are good for detecting cancers in softer tissues, like the breasts. In the study, patients with an … 2019 Jan;212(1):94-102. doi: 10.2214/AJR.18.19928. Colon cancer is a type of cancer that begins in the large intestine (colon). Objective: A gastroenterologist performs a biopsy by retrieving polyps and other tissue samples from the colon or rectum during a colonoscopy. The new findings indicate that MRI colonography can accurately detect polyps that have the potential for becoming cancerous. This is a small magnetic coil that goes inside your back passage during the scan. A new test called Cologuard, a stool-based colorectal screening test that detects the presence of red blood cells and DNA mutations, may indicate the presence of certain kinds of abnormal growths that may be cancers such as colon cancer or precursors to cancer. Some tests that detect adenomas and polyps can prevent the development of cancer because these tests allow growths that might otherwise become cancer to be detected and removed. A pelvic ultrasound can often detect bladder cancer, even when they are being done for other reasons because the bladder needs to be full to create clear pictures of all the organs and structures in the pelvis, which in turn creates a clear picture of the bladder. While the results are encouraging, the researchers believe that conventional colonoscopy will remain the first choice screening method for colon cancer. Since the specificity of ultrasound is probably low, diagnosis must be confirmed by X-ray and/or endoscopy. Instead, MRI uses a large magnet, radio waves, and a computer to produce these images. 2013 Sep;54(7):722-30. doi: 10.1177/0284185113484018. When diagnosing uterine cancer, an MRI may be more effective than a CT scan, because an MRI may be better at looking at the various layers of the uterus wall. Symptoms of Colon Cancer that you should be … Would you like email updates of new search results? However, MRI is superior in the detection of colorectal liver metastasis, and MRI is standard in local staging of rectal cancer. These limitations depend on the scanner resolution and the skill of the radiologist. It is often done before surgery (see Types of Treatment). Design: Although not suitable as a first choice screening procedure for colorectal cancer, routine abdominal ultrasound can detect even non-suspected colonic tumors, especially in the ascending colon. An examination of your entire colon using a long, flexible tube equipped with a camera (colonoscopy) is one way to detect colon cancer and polyps. Rectal Cancer MR staging Rhiannon van Loenhout, Frank Zijta, Max Lahaye, Regina Beets-Tan and Robin Smithuis ... Ref: Colon and Rectum Cancer Staging- quick reference (AJCC) This figure illustrates the T-stage and mesorectal fascia involvement in the axial plane, which is usually the best imaging plane for the T-staging. Miao SS, Lu YF, Chen HY, Liu QM, Chen JY, Pan Y, Yu RS. MRI scans can work on soft or dense tissue and are especially useful in … Why an MRI is done. Answered March 31, 2019 No it is not. The colon is the final part of the digestive tract. Horvat N, Raj A, Liu S, Matkowskyj KA, Knezevic A, Capanu M, Shia J, Pickhardt PJ, Gollub MJ. In other words, more than 80% of women called back for more testing and nearly three quarters of those who underwent … “Colon cancer, however, starts inside of the bowel. Unlike colonoscopy, however, this screening method does not require the insertion of a long tube in the rectum. You can find certain types of cancer without a biopsy. MRI creates cross-section pictures of your insides. MRI has shown high specificity and moderate sensitivity and could be a good option to detect extramural venous invasion among colorectal cancer patients, especially with high-resolution MRI technology. Although not suitable as a first choice screening procedure for colorectal cancer, routine abdominal ultrasound can detect even non-suspected colonic tumors, especially in the ascending colon. Early detection and diagnosis of cancer can significantly increase your chances of being treated successfully. An important advantage of conventional colonoscopy is that polyps that are detected can be removed or biopsied during the procedure. I can't get him to listen to me and go get it checked with a colonoscopy. Here you can see an example of an MRI scan. A double-contrast barium enema is a type of X-ray that helps a doctor examine the colon. Lab tests Advanced genomic testing : The most common lab test for uterine cancer is the genomic tumor assessment, a test that examines a tumor to look for DNA alterations that are driving the growth of cancer. CT is notoriously unreliable for polyps or early stage tumors. Researchers have developed a new MRI tool that can identify cases of ovarian cancer which are difficult to diagnose using standard methods. Ultrasound is often one of the "first line" tests in the detection of cancer. Magnetic Resonance Imaging (MRI) The MRI uses magnets to detect and diagnose cancers. Jian J, Li Y, Pickhardt PJ, Xia W, He Z, Zhang R, Zhao S, Zhao X, Cai S, Zhang J, Zhang G, Jiang J, Zhang Y, Wang K, Lin G, Feng F, Wu X, Gao X, Qiang J. Eur Radiol. Colorectal cancer is the second leading cause of cancer deaths in the United States. However, a PET scan can be helpful in identifying the following types of cancer. Radiol Clin North Am. Colon cancer is currently staged with CT. In a person with colorectal cancer, a CT scan can check for the spread of cancer to the lungs, liver, and other organs. Colon cancer is the most common, and the most preventable, form of gastrointestinal cancer and the third most common cancer in the United States. It is often done before surgery (see Types of Treatment). NIH I can't get him to listen to me and go get it checked with a colonoscopy. Answered March 31, 2019 No it is not. Since the specificity of ultrasound is probably low, diagnosis must be confirmed by X-ray and/or endoscopy. Settings: Contrast-enhanced CT imaging for the assessment of lymph node status in patients with colorectal cancer. Moreover, with use of a special technique called “fecal tagging,” patients do not need to undergo the uncomfortable bowel cleansing required with conventional colonoscopy. But your doctor may test your blood for clues about your overall health, such as kidney and liver function tests. Quite a number of hybrid PET/MRI studies on colorectal cancer have been published in recent years, although not all concern primary staging [17,18,19,20, 23]. Test can be a sensitive colon cancer detector Dr. Keith Roach; Jan 21, 2021 5 min ago; DEAR DR. ROACH: I am a 74-year-old male, and I recently received a … The only radiological modality that is sensitive enough to reliably detect a colon cancer is a CT colonography. The ability of radiologists for the detection of pancreatic cancer was limited until recently because of the problems associated with the MRI and computed tomography techniques, which exists. Once the scan is finished you can go home. Any of your experience would be appreciated. A double-contrast barium enema is a type of X-ray that helps a doctor examine the colon. By contrast, MRI colonography nearly always missed smaller polyps. PET/CT scan. This imaging test may help doctors stage rectal cancer. There are a few different ways to do this, depending on the type of cancer you have and how much it has grown. An MRI uses magnetic fields, not x-rays, to produce detailed images of the body. Often the doctor will recommend a CT scan for a detailed examination of internal organs such as the large intestine. Messina C, Bignone R, Bruno A, Bruno A, Bruno F, Calandri M, Caruso D, Coppolino P, Robertis R, Gentili F, Grazzini I, Natella R, Scalise P, Barile A, Grassi R, Albano D. Cancers (Basel). MRI is noisy with loud knocking or clanging sounds that you can hear during the scan. These usually consist of a colonoscopy, MRI and CT scan and I do always have a blood test.  |  2020 Aug 21;12(9):2368. doi: 10.3390/cancers12092368. Virtual CT colonography is an improved image, however the best way to definitely diagnose colon cancer is with a regular colonoscopy. Survival rates have improved markedly, and long-term survival can now be achieved in patients with advanced-stage cancers at diagnosis. In addition, together with its superior liver imaging, MRI might become the optimal staging modality for colon cancer. I wish the doctor would put some fear into him so that he would get a colonoscopy. 2016 Nov;207(5):984-995. doi: 10.2214/AJR.15.15785. HHS Last post. AJR Am J Roentgenol. Diagnostic Accuracy of CT for Local Staging of Colon Cancer: A Systematic Review and Meta-Analysis. Researchers have developed a new MRI tool that can identify cases of ovarian cancer which are difficult to diagnose using standard methods. Doctors recommend certain screening tests for healthy people with no signs or symptoms in order to look for signs of colon cancer or noncancerous colon polyps. If you have cancer of the back passage (rectum) your doctor may do this test with an endo anal coil. It still doesn't sound good. He had a abdominal xray,liver ultrasound and lung xray and they were all normal. Thu, 07/07/2011 - 21:24 #1. No sedative or analgesic medications were given. Rollvén E, Holm T, Glimelius B, Lörinc E, Blomqvist L. Acta Radiol. However, MRI is superior in the detection of colorectal liver metastasis, and MRI is standard in local staging of rectal cancer. Early cancer treatments can also be less expensive and complicated than more advanced disease treatments, which may spare you and your family heartaches. While it can't diagnose cancer, it can detect the abnormal tissues that may possibly be cancerous. Several screening tests have been developed to help doctors find colorectal cancer before symptoms begin, when it may be more treatable. Testing might also be done to see if the cancer cells have changes in any of the mismatch repair (MMR) genes (MLH1, MSH2, MSH6, and PMS2). ANSWER: A FIT test is a fecal immunochemical test for blood. Limitations: Epub 2020 Mar 10. Dr. Christiane A. Kuehle, from University Hospital Essen in Germany, and colleagues found that MRI colonography was fairly good at detecting polyps greater than 5 millimeters in diameter. Results: The study was limited by its retrospective nature and moderate number of inclusions. Both readers evaluated tumor characteristics, including invasion through bowel wall (T3/T4 tumors), invasion beyond bowel wall of ≥5 mm and/or invasion of surrounding organs (T3cd/T4), serosal involvement, extramural vascular invasion, and malignant lymph nodes (N+). It can show metastatic colon cancer that has spread to the liver. The cancer detection rate among women who actually underwent MRI screening was 16.5 per 1,000 screenings. I'm worried that he'll end up with colon cancer. “However, for patients unwilling to undergo colonoscopy, MRI colonography should be regarded as an attractive alternative.”. 2020 May;19(5):3451-3458. doi: 10.3892/ol.2020.11454. He has had blood in his stools but the doctor had tests done on the stool and he says that it was probably hemorroids. A barium enema is an x-ray of the colon and rectum. A contrast medium is a substance used to make clearer images of the inside of the body. It still doesn't sound good. What can an MRI detect. It usually begins as small, noncancerous (benign) clumps of cells called polyps that form on the inside of the colon. Magnetic resonance imaging (MRI). I am due to have an MRI scan before my hysterectomy. Yes: however usually advanced colon cancers are the ones that can be picked up. MRI. I am trying to find out if MRI scans can be used to detect bowel and colon problems, basically things such as ulcers, as I have had no less than four proctograms in my past history and a colonoscopy and a sigmoid, they are uncomfortable, unpleasant and the results were not conclusive even though a 'hands on' under anathetic established I had a fully prolapsed bowel that needed immediate surgery. These tests may be critical in helping diagnose colorectal cancer. After cancer treatment, an MRI is unable to determine whether remaining masses are cancerous: The MRI might show signs of cancer, but that cancer might not be active. Optimal (local) staging of colon cancer could become crucial in selecting patients for neoadjuvant treatment in the near future (Fluoropyrimidine Oxaliplatin and Targeted Receptor Preoperative Therapy trial). The ability of radiologists for the detection of pancreatic cancer was limited until recently because of the problems associated with the MRI and computed tomography techniques, which exists. Clipboard, Search History, and several other advanced features are temporarily unavailable. Paspulati et al conducted a study on 12 colorectal cancer patients, but only two had rectal cancer, for whom the authors reported an advantage of PET/MRI in T-staging. All of the patients underwent an MRI (1.5-tesla; T2 and diffusion-weighted imaging) of the abdomen and were retrospectively analyzed by 2 blinded, independent readers. The colon and rectum make up the large intestine, which helps the body process waste. Colon cancer can occur in any part of the colon. In a person with colorectal cancer, a CT scan can check for the spread of cancer to the lungs, liver, and other organs. Dr. Binderow continues, “CT is very good for solid organ disease — liver, spleen, kidneys. Get the latest public health information from CDC: https://www.coronavirus.gov, Get the latest research information from NIH: https://www.nih.gov/coronavirus, Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. However, a PET scan can be helpful in identifying the following types of cancer. MRIs use strong magnetic fields and radio waves to produce exceptionally detailed images. NEW YORK (Reuters Health) - The use of magnetic resonance imaging, or MRI, may offer a more tolerable alternative to conventional colonoscopy in screening for colon cancer, new research suggests. Your doctor may also test your blood for a chemical sometimes produced by colon cancers (carcinoembryonic antigen, or CEA). Elibol FD, Obuz F, Sökmen S, Terzi C, Canda AE, Sağol Ö, Sarıoğlu S. Diagn Interv Radiol. 2021 Jan;31(1):403-410. doi: 10.1007/s00330-020-07091-2. The study was conducted at the Maastricht University Medical Centre. MRI inaccuracy in treatment monitoring. Are there any blood markers that indicate colon cancer? Not all types of cancer can be detected through PET scans, such as Breast Cancer, etc. An MRI uses magnetic fields, not x-rays, to produce detailed images of the body. The colon is the final part of the digestive tract.Colon cancer typically affects older adults, though it can happen at any age. A barium enema helps doctors find health conditions in the colon and rectum, such as inflammation, polyps, and cancer. Magnetic resonance imaging (MRI). With MRI colonography, images are taken of the colon that resemble those seen with colonoscopy. Colon cancer is a type of cancer that begins in the large intestine (colon). Cross-sectional imaging modalities like computed tomography (CT) and magnetic resonance imaging (MRI) is usually the first tool for evaluation of suspected cases of rectal cancer that not only help in detection but also in local staging as well as in delineating the distant spread of cancer. MRI had a high sensitivity (72%-91%) and specificity (84%-89%) in detecting T3/T4 tumors (35/55) and a low sensitivity (43%-67%) and high specificity (75%-88%) in detecting T3cd/T4 tumors (15/55). Epub 2018 Nov 13. The only radiological modality that is sensitive enough to reliably detect a colon cancer is a CT colonography. Advanced x-ray machines, like the CT scan or mammogram are good for detecting cancers in softer tissues, like the breasts. Instead, MRI uses a large magnet, radio waves, and a computer to produce these images. This can increase the risk of other cancers in the future. The barium helps create clear images of the colon. An MRI is a test that produces very clear pictures of the human body without the use of X-rays. I mean will it detect even the very tiniest amount of cancer? Myth: Most of the time, when you are diagnosed with colon cancer, it is already spreading to other parts of your body. This is a small magnetic coil that goes inside your back passage during the scan. Barium is a contrast medium. Multiparametric magnetic resonance imaging can help distinguish between nonmuscle-invasive and muscle-invasive bladder cancer and possibly eliminate the … USA.gov. Colon cancer develops from growths within the wall of the intestine such as polyps or tumors. However, improvements are needed to better detect small polyps, according to the report in the journal Gut. PET-CT scans have risks. What can an MRI detect . But I know these aren't used to find colon cancer. Tissue samples may also be retrieved during other endoscopic procedures, such as a sigmoidoscopy or endoscopic ultrasound. The purpose of this study was to evaluate the diagnostic performance of MRI for local staging of colon cancer. Epub 2016 Aug 4. The barium helps create clear images of the colon. However, more research is needed to confirm this. This test can show some markers of Bowel cancer so if you have had the same blood test and it hasn't thrown anything up, it's a good sign. However, colorectal cancer is still the second leading cause of cancer-related death in the United … A standard x-ray works best on bone and other dense tissues, and is good for detecting bone cancers or tumors in the lungs. Interobserver agreement was compared using κ statistics. COVID-19 is an emerging, rapidly evolving situation. Lubbock Avalanche-Journal . Also known as a virtual colonoscopy. No blood test can tell you if you have colon cancer. Log in or register to post comments. Study shows MRI can help detect prostate cancer more accurately. It probalby improved because of the thyroid treatment. The cancer detection rate among women who actually underwent MRI screening was 16.5 per 1,000 screenings. These machines use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures — but do they pose significant health risks? It can show metastatic colon cancer that has spread to the liver. It can show large, more advanced cancers or masses.” So for instance, my father went to the ER complaining of significant lower abdominal pain and a persistent feeling of constipation. Fact: This is simply not true. This site needs JavaScript to work properly. Cysts and tumors within the bladder can usually be seen very clearly. It probalby improved because of the thyroid treatment. Last month they check it was 11 and he got 11 again this month, so no improvement or worssening. CT scans usually don't catch neoplasms smaller than a millimeter as submillimeter images are difficult distinguish from background artifact, which is noise. It is uncomfortable but gives a very clear picture of the back passage (rectum). MR image-based radiomics to differentiate type Ι and type ΙΙ epithelial ovarian cancers. Identification of Novel Transcriptome Signature as a Potential Prognostic Biomarker for Anti-Angiogenic Therapy in Glioblastoma Multiforme. He's 45. See here for a complete list of exchanges and delays. Colonoscopy is usually the first port of call for bowel cancer. For thi… 2020 Jun 8;12(6):1493. doi: 10.3390/cancers12061493. See Video Abstract at http://links.lww.com/DCR/A309. 2016 Jan-Feb;22(1):5-12. doi: 10.5152/dir.2015.15089. I'm worried that he'll end up with colon cancer. Also known as a virtual colonoscopy. If this test reveals the possibility of colon cancer, a colonoscopy may be necessary. The January 2017 study looked at the effect of using an MP-MRI earlier in the prostate cancer screening process. For detecting serosal involvement and extramural vascular invasion, MRI had a high sensitivity and moderate specificity, as well as a moderate sensitivity and specificity in the detection of nodal involvement. He's 45. eCollection 2020. He had a abdominal xray,liver ultrasound and lung xray and they were all normal. For example, it could be scar tissue left over from cancer killed off by your treatment. Yes it can. 01/21/21 Roach Fecal immune test can be a sensitive colon cancer detector. Early detection and diagnosis of cancer can significantly increase your chances of being treated successfully. MP-MRI uses the same machine as other MRI imaging, but differs in that it uses multiple, specific imaging sequences to make a diagnosis instead of one essential MRI sequence. I wish the doctor would put some fear into him so that he would get a colonoscopy. “CT scans are adept at locating pathology IN the abdomen or outside of the bowel,” says Sander R. Binderow, MD, FACS, FASCRS, with Northside Hospital in Georgia. The positive predictive value—meaning a test correctly detects cancer when it is present—was 17% for recalls for additional testing and 26% for breast biopsy.