Can a CT scan tell the difference between diverticulitis and colon cancer

The Differential Diagnosis of Diverticulitis vs

Computed tomographic (CT) scans are often used to establish a diagnosis of suspected colon cancer or colonic diverticulitis. Although CT images are generally effective in identifying these.. Specific CT criteria help to differentiate colonic diverticulitis from colon cancer. CT scan with intravenous contrast administration would be the best noninvasive imaging modality in the ER for the accurate diagnosis and appropriate management of such disease. Specific CT criteria help to differentiate colonic diverticulitis from colon cancer In a case-control study, Chintapalli et al (40) believed that the specificity of CT findings of diverticulitis and colon cancer is so high that an unequivocal diagnosis can be made with 100% accuracy for both diseases Purpose: To determine whether computed tomographic (CT) perfusion measurements in prospectively recruited patients can be used to differentiate between diverticulitis and colorectal cancer and to compare this discrimination with that of standard morphologic criteria

Differentiating colonic diverticulitis from colon cancer

My father has colon cancer and the CT scan wasn't enough. They had to do a colonoscopy and then exploritory surgery just to make sure it was in fact colon cancer. I think with diverticulitis they do sometimes do surgery depending on how badly the pocket is To properly diagnose diverticulitis, your doctor will conduct a physical examination checking your abdomen and pelvic region. Other tests include blood tests, pregnancy test for women, liver.. The doctor ordered a CT scan and at some point, she commented that it would be good news if the scan did not show an obstruction, as this could possibly be a malignant mass—having originated as colon cancer but having infiltrated outside of the colon where a CT scan would pick it up. (Turned out my father had diverticulitis. A computed tomography (CT) scan is a sophisticated x-ray machine that affords a three-dimensional view inside the body, and can help provide clear pictures to determine if you have diverticulitis, how serious the diverticulitis is, if there is diverticular bleeding, and review the health of the surrounding colon wall Imaging tests, such as X-rays, computed tomography (CT) scans, and magnetic resonance imaging (MRI). These tests can make images of the whole colon by using X-rays and computers

Colonoscopy after CT Diagnosis of Diverticulitis to

But yea, they Cannot tell the difference between Diverticulitis and Cancer Via a CT Scan..it has to be scope, Biopsy. I know I was Terrified, cause I had been so sick for so Long, and my Weight Plummeted.. I didn't Feel I could go on that way and Opted for the Resection Sooner rather then later..and was So Happy I did Hi, please can anyone help me, am in so much pain. I thought I may have ovarian cancer from all the symptoms, which are painful left abdominal pain, lower backache which is constant, pain in groin and down left leg, fever and then chills, very fatigued to the point of dragging myself through the day, constipation, frequent and urgent need to urinate and now nauseus as well Right colonic diverticulitis can be difficult to distinguish from colon carcinoma, especially if the inflamed diverticulum is not well visualized on CT. After supportive management, colonoscopy or contrast enema is recommended to confirm the diagnosis. Open in a separate window Figure A significant correlation was found between the location of diverticulitis and cancer (p < 0.001). The diagnosis of cancer was made within 6 months from the date[Infographic] Diverticulitis, an intestinal disorder marked by serious symptoms, is often misdiagnosed as colon cancer. But can it actually cause.

Problems with your digestive system can cause serious discomfort and disrupt normal day to day life activities. The underlying causes of these painful symptoms can be difficult to diagnosis. Two common digestive diseases include colon cancer and ,the less serious, diverticulitis. Each have unique symptoms and very different treatment paths. Down Low On Diverticulitis 1. In some patients, death in the course of acute colonic diverticulitis was the end stage of another fatal disease, like cancer. In uncomplicated diverticulitis, cardiovascular disease was the main cause of death within 100 days. Can a CT scan tell the difference between diverticulitis and colon cancer? Computed tomographic (CT) scans are often. CT scans utilize X-rays to form images of organs and tissues inside the body (for example, abdominal organs, brain, chest, lungs, heart) while colonoscopy is a procedure that can visualize only the inside surface of the colon. CT scans use radiation (X-rays) to form images while colonoscopy uses a flexible instrument equipped with a light and camera to form images Colon difference between diverticulitis and colon cancer symptoms may present similar symptoms, they are two very different Colon Cancer After Acute Diverticulitis Treatment - NCBI - NIH Computed tomographic (CT) scans are often used to establish a diagnosis of suspected colon is diverticulosis related to colon cancer Difference between ulcerative colitis and diverticulitis causes stool tests, and CT scans, which can help gauge severity of diverticulitis. Acute symptoms could be a sign of a perforated.

Colon cancer may be diagnosed with the following colon cancer testing: Colonoscopy, a procedure which involves a flexible tube with an attached video camera. This tube, called an endoscope, is inserted through the rectum to identify abnormal conditions, diagnose colon cancer, and plan a treatment regimen for colon cancer patients A CT scan for suspected diverticulitis must be undertaken within 72 hours of the clinical diagnosis. • CT is not very reliable for differentiating diverticulitis from an inflammatory or perforated colon cancer. Diverticulitis • Owing to its topography, right or left diverticulitis can have retroperitoneal expression. Diagnosis is typically made via blood work, and sometimes a CT scan, to determine the extent of infection around the colon and rule out other causes. It's difficult to predict who will go on to develop diverticulitis, although research suggests a family history may increase risk

Differentiation between Diverticulitis and Colorectal

The examination, when we feel the abdomen and it's tender where the diverticulosis is usually present. A CT scan of the abdomen usually confirms this diagnosis. If somebody gets an acute diverticulitis every two or three years it can be treated with antibiotics. Having frequent attacks of diverticulitis can lead to complications, adhesions imaging tests, such as X-ray or CT scan of the colon and rectum The biopsy can confirm the presence of colon cancer and imaging tests can help assess whether the cancer has spread. IBS vs. colon. Settings: Trained abdominal radiologists from 2 centers performed a blinded review of CT scans obtained to locally stage proximal colon cancer according to previously defined prognostic groups, including T1/2, T3/4, N+, and extramural venous invasion. CT findings were compared with histopathologic results as a reference standard

ct scan - Gastroenterology - MedHel

CT scan of the abdomen and pelvis (estimated cost $2000) is very useful in diverticulitis with sensitivity and specificity reported as high as 98 and 99%. CT scan can not only confirm the. August 8, 2009 at 12:09 pm. Report. I was also diagnosed with diverticulitis from colo/rectal bleeding until the CA-125 results came back at 1345.....it wasn't diverticulitis at all it was stage lllC ovarian cancer and the cancer had spread to the colon. I had 10 or 12 inches of colon removed The best test is a CT scan of the abdomen, ideally performed after the patient receives contrast material both by mouth and intravenously. And a month or two later, after treatment has quieted things down, the patient should have a colonoscopy, both to evaluate the diverticular disease and to be sure that no other abnormalities are lurking Diverticulitis and Colon Cancer It should be recognized that perforated colon cancer can mimic both the clinical and radiographic findings of diverticulitis. CT findings that suggest colon cancer rather than diverticulitis include the presence of pericolonic lymphadenopathy (measuring >1 cm in short axis) with or without pericolonic edema

Colon cancer vs. diverticulitis: Causes, symptoms, risk ..

Video: Can a CT Scan Detect Colon Cancer? » Scary Symptom

How can you tell the difference between testicular cancer and just epyditimitis Can liver cancer be diagnosed by ct scan and mri Connect by text or video with a U.S. board-certified doctor now — wait time is less than 1 minute Early detection of colon cancer through screening can be key to better outcomes and survival. Medically reviewed by Jeffrey A. Meyerhardt, MD, MPH Irritable bowel syndrome (IBS) is a chronic disorder in which the large intestine undergoes abnormal contractions, producing abdominal pain, cramps, diarrhea, constipation, or a mix of these symptoms That CT scan, as it happened, turned up something scary. The doctor told Osterberg there was a mass in his sigmoid colon, the part of the large intestine closest to the rectum and anus

What can I Expect from a CT Scan for Diverticulitis

Colorectal Cancer vs

Yes: Ct scan of the liver can be seen without contrast, however specific findings can be enhanced with contrast. 3 doctors agree. 1 comment. 2. 2 thanks. Send thanks to the doctor. View 1 more answer. 90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more A2A. Yes, They can look alike on CT scan. Biopsy is one of the way to figure out the cause of findings on CT scan. There are few features that can help distinguish on CT scan. Also, clinical presentation also can help in the decision making proces.. Diverticulosis is a condition that describes small pouches (diverticula) in the wall of the digestive tract that occur when the inner layer of the digestive tract bulges through weak spots in the outer layer. When these diverticula become inflamed or infected, diverticulitis can develop. Irritable bowel syndrome (IBS) is a chronic gastrointestinal disorder CT scans can detect bone and joint problems, like complex bone fractures and tumors. If you have a condition like cancer , heart disease , emphysema , or liver masses, CT scans can spot it or help. Diverticular disease and diverticulitis are related digestive conditions that affect the large intestine (bowel). Diverticula are small bulges or pockets that can develop in the lining of the intestine as you get older. Most people with diverticula do not get any symptoms and only know they have them after having a scan for another reason

CT scans have various purposes. They include helping to diagnose a condition, guiding medical procedures, such as needle biopsies, and monitoring the effectiveness of certain treatments, such as cancer treatments. At the low doses of radiation a CT scan uses, your risk of developing cancer from it is so small that it can't be reliably measured. Cecum cancer is a specific type of cancer that can develop at the very beginning of the colon. Signs and symptoms are sometimes elusive, but historical studies show that up to 20% of colorectal cancers occur in the cecum (in some studies it is much less common). 1. This article will discuss the signs and symptoms of cecum cancer, and how it is. Pouches, called diverticula, can develop along the wall of the colon. When they become infected, a person has diverticulitis. Many people experience constipation and severe pain, and a diet low in. Vesicovaginal fistulas can be seen after a urological or gynecological surgery. They can also be linked to gynecological cancers. Fistulas to the bowel are mostly a result of a disease that causes inflammation, such as Crohn's disease or diverticulitis. About 2 out of 10 cases of bowel fistula are caused by bowel cancer

Interesting query this is! The signs and symptoms associated with colorectal cancer (CRC) are nonspecific, and the differential diagnosis, particularly among patients presenting with of abdominal pain and rectal bleeding, is broad. Many conditions.. Computed tomography (CT) imaging is the most appropriate diagnostic tool to confirm suspected left colonic diverticulitis. However, the utility of CT imaging goes beyond accurate diagnosis of diverticulitis; the grade of severity on CT imaging may drive treatment planning of patients presenting with acute diverticulitis. The appropriate management of left colon acute diverticulitis remains.

Thickening of Stomach lining DailyStrengt

  1. Comparing CT and PET-CT. PET/CT scans provide significantly more information than CT scans, and are far more reliable when diagnosing cancer. The reality is that you cannot rely on a CT scan (or ultrasound, MRI, or blood test) to tell you if you have cancer. It is only with a PET/CT scan that you will know for sure.. PET/CT, which is a combination of positron emission tomography (PET) with.
  2. e the location, size and shape of a tumour before having radiotherapy, or allow a doctor to take a needle biopsy (where a small tissue.
  3. Although pancreatic cancer is known as a silent disease, it is still extremely important to know the symptoms and risk factors associated with pancreatic cancer so those individuals at high risk can begin getting regular scans. People at higher risk of having pancreatic cancer include males, older adults, those with a family history of.
  4. CT scans can produce detailed images of many structures inside the body, including the internal organs, blood vessels and bones. They can be used to: diagnose conditions - including damage to bones, injuries to internal organs, problems with blood flow, stroke , and cancer. guide further tests or treatments - for example, CT scans can help.

Diverticulosis or Colon Cancer? Please help! Cancer Cha

  1. Irritable Bowel Syndrome vs Colon Cancer. • Irritable bowel syndrome sets in early while colon cancer is common after the age of 50. • IBS presents with alteration of bowel habits mainly while bleeding per rectum is the major presenting feature of colon cancer. • Weight loss, loss of appetite, and inflammatory bowel diseases are closely.
  2. These polyps, however, can gradually mutate into cancerous cells. There is a five year 92% survival rate if colon cancer is caught in its early stages. The rate drops if caught later. To be safe, begin having screenings at age 45 unless you have other risk factors that may warrant diagnostic testing at a younger age. How To Tell the Difference.
  3. Cat Scan is today. Her CA125 has climbed to 73 from 30 at the end of chemo. She also feels good. The emotional aspect and anxiety are the most difficult at this time, I think. She will find out what treatment they will proceed with in a week and a half - either some sort of pills or a different chemo, depending on the results of the cat scan
  4. A CT (CAT) scan that checks your colon using air and contrast. Flexible sigmoidoscopy. This test checks the inside of part of your large intestine. It helps to tell what is causing constipation. A short, flexible, lighted tube (sigmoidoscope) is put into your intestine through the rectum. This tube blows air into your intestine to make it swell
  5. Can they tell if a cyst is cancerous just by a CT scan??? My CA125 was said to be ok. I have read about some of the symptoms, and I am not trying to be psycho symatic, but I really believe I have alot of the symptoms...the three main ones are severe lower back pain..very painful when I go to bed and when I wake up...I take sleeping pills to help me go to sleep, by about 3-4:00 am My back is.
  6. The lymph nodes near the prostate are a common place for prostate cancer to spread to. An MRI scan or CT scan is used to find out your N stage. The possible N stages are: NX The lymph nodes were not looked at, or the scans were unclear. N0 No cancer can be seen in the lymph nodes. N1 The lymph nodes contain cancer

Imaging Update: Acute Colonic Diverticuliti

CT scans can be performed during the patient's stay at a hospital or in later checkups. Mostly, the chest and abdomen are the subjects of the CT scan process. Both contrast and non-contrast CT scans are regarded as safe procedures having minimal risk and thousands of people worldwide go through these processes every year colon infection, which can be caused by organisms, such as a bacteria or virus ischemic colitis, an inflammation of the colon due to decreased blood flow to that area diverticulitis , caused by.

Colon Cancer Vs. Diverticulitis: Causes, Symptoms, Risk ..

But in some patients, the cancer will return, usually within 3 years after surgery. To try to detect recurrences as early as possible, people who have finished colorectal cancer treatment regularly return to their doctors for imaging tests (like CT or MRI scans) and a blood test to detect CEA, a substance that can indicate if cancer is growing. ER visit did. Ct scan which showed a new lesion on the liver. A biopsy revealed it was colon cancer that metastasized to the liver. I was 50 at the time of the breast cancer. I just had my 5 year check up for the breast cancer and thought I had beat it. Boy, was I ever surprised by the diagnosis of colon cancer An abdominal/pelvic computed tomography (CT) is often obtained to confirm a diagnosis of acute diverticulitis when suspected and should be the initial diagnostic test of choice. CT is also the. Back on low fiber and treated with usual cipro and flagyl. Now here we are March and follow up ct scan says diverticulitis again, But between January and March got C Diff along the way and then e coli while in Mexico. I demanded to be put on a different antibiotic so they gave me Amox/Clav but second culture still says I had c diff

It can also create a hole in your colon that connects to other structures, such as your bladder or other parts of your intestines. This connection is called a fistula and may require surgery to fix. Doctors often diagnose diverticulitis using a computed tomography (CT) scan of your abdomen and pelvis We report a case of a 71-year-old female who presented with right lower quadrant (RLQ) abdominal pain and was diagnosed on CT scan with right-sided diverticulitis with perforation. She was admitted under the surgical service after consultation and received intravenous fluids, intravenous antibiotics, and pain medications as needed. The patient was discharged 2 days after admission in stable. Computed tomography is an imaging procedure that uses special x-ray equipment to create detailed pictures, or scans, of areas inside the body. It is sometimes called computerized tomography or computerized axial tomography (CAT).. The term tomography comes from the Greek words tomos (a cut, a slice, or a section) and graphein (to write or record). Each picture created during a CT procedure.

Sure, a CT scan can be consistent with diverticulitis, but many other conditions can precisely mimic this CT scan appearance. So, the physician has to make a clinical diagnosis of diverticulitis. This means that the doctor must analyze all of the data - your symptoms, the labs, radiology results - and then make a judgment CT enterography is an imaging test that uses CT imagery and a contrast material to view the small intestine. The procedure allows your healthcare provider to determine what is causing your condition. He or she can also tell how well you're responding to treatment for a health issue, such as Crohn's disease A CT scan of your abdomen will be used to show any perforation in your bowel. You may be given contrast dye to help your bowel show up better in the pictures. Tell the healthcare provider if you have ever had an allergic reaction to contrast dye. How is a perforated bowel treated? Antibiotics are used to treat or prevent a bacterial infection

The inflammation of the colon is known as colitis. Diverticulitis is the inflammation of the diverticula in the colon. As seen from the definitions, colitis is a condition that occurs in the colon whereas diverticulitis is a condition that takes place in the diverticula. This is the main difference between colitis and diverticulitis. CONTENTS. 1 Chronic fatigue in colon cancer can develop as a result of depleting energy sources, loss of muscle mass and internal blood loss from the disease itself. In the absence of nutrients and energy, the body cells shift their metabolism from glucose to ketones and tend to work harder to strive for existence. This creates an acidic environment in the. Colorectal cancer is the second-leading cause of cancer-related death in the U.S. Fortunately, it is preventable through proper screening. In a September 10 article published in the Huffington Post, two radiologists, Dr. Joel Bortz and Dr. Joseph Lebovic, argue that CT colonography, or virtual colonoscopy, is superior to traditional colonoscopy for colon cancer screening

CT scans are the best alternative to colonoscopy to investigate bowel cancer by Sam Wong 14 February 2013 'Virtual colonoscopy' using CT scans is more effective for investigating patients with possible bowel cancer than an X-ray test, says a new study Because diverticulitis can be difficult to distinguish from colon cancer on CT in the acute setting, radiography with contrast enemas may be helpful as a follow-up study to exclude an underlying.

Diverticulitis vs Colon Cancer - HR

It is also important to carry out annual check-ups. If you have had an ultrasound or CT scan, the difference will appear that a tumor will appear in an ultrasound as a well-defined capsule that contains a subtle mass whereas a cyst will appear as a rounded mass with a thin wall and may show fluid within it. If you have had an ultrasound, it's. A computed tomography (CT) scan can be used to determine the extent of diverticulitis. When diverticulitis is identified, it is important to treat it and to monitor the patient for any signs of changes. These preventive efforts can help to reduce the risk that a diverticulum will perforate and cause complications for the patient

An ultrasound is an effective way to tell the difference between solid tumors and fluid-filled cysts because of their different echo patterns. 4. Positron Emission Tomography and Computed Tomography (PET-CT) Scans. Doctors can combine PET scans with CT scans. However, your doctor may call this a PET scan For detecting cancer that has come back throughout the body, a CT scan is preferable to an MRI. As radiologists, we follow a measure called as low as reasonably achievable. This means we give enough radiation to create CT images that are of high enough quality that we can make a good clinical decision, but we keep the radiation as low as. CT scans save lives. But they can also cause cancer. And of the 70 million scans done last year -- double the number a decade ago -- at least 23 million were unnecessary. Here's why, and what you. Computerized tomography (CT or CAT) scan, which creates a 3-dimensional picture of the inside of the body using x-rays. Paracentesis, which is the removal and analysis of fluid from the abdomen with a needle. This test can be used to find out the cause of ascites. Managing and treating ascite

Can diverticulitis lead to colon cancer

Regarding imaging studies, a CT scan is the best method to confirm the diagnosis. It is the first choice over studies that use contrast like barium enema during episodes of acute abdominal pain. Also, CT scans can help doctors to determine the severity, the clinical stage, and the presence of diverticulitis complications Severe attacks of diverticulitis can cause lasting damage to your colon. Abscesses can form when the inflamed diverticula rupture. Mild abscesses can be treated using antibiotics. Severe abscesses require draining through a process called percutaneous drainage. The types of surgical procedures vary between people and cases A CT scan shows that I have air in my abdominal cavity, so I end up on the operating table for emergency exploratory surgery. I awake in a hospital room with my abdomen split open and a colostomy bag on my right side. My colon has perforated due to serve Diverticulitis

Diverticular disease is a group of conditions in which tiny pouches form in the colon. The pouches are called diverticula. These pouches bulge out through weak spots in your colon. The pouches can become inflamed (red, swollen) or infected. When the pouches are infected, the condition is called diverticulitis. Diverticular disease includes Diverticular disease can be difficult to diagnose from the symptoms, alone because there are other conditions that cause similar symptoms, such as irritable bowel syndrome (IBS).. As a first step, your GP may recommend blood tests to rule out other conditions such as coeliac disease (a condition caused by an abnormal immune response to gluten) or bowel cancer Aim The aim of this study was to investigate whether patients with diverticulitis can be prioritized with higher urgency for a subsequent full colonic examination based upon the emergency abdominal CT scan performed at the time of presentation. Method All patients with a diagnosis of diverticulitis, hospitalized during 2006 and having a CT scan on admission and a subsequent 'clean colon.

Virtual colonoscopy uses CT scanning to obtain an interior view of the colon (the large intestine) that is ordinarily only seen with an endoscope inserted into the rectum. Important Information Prior to Your Exam Please let us know if you have any allergies or adverse reactions to medications. If you are pregnant or may be pregnant, please tell your doctor or technologist. Inform your doctor. A CT scan series of the lower abdomen showing ovarian cancer that has metastasized (spread) to the peritoneum. This CT scan of the upper abdomen shows multiple tumors in the liver and spleen that have spread (metastasized) from an original intestinal cancer (carcinoma). The abdomen is the area of the body between the chest and pelvis Cancer is the abnormal growth of cells in an organ or structure in the body. As the abnormal cells grow, they can take over the organ, preventing it from functioning properly. The abnormal cells can also spread to other parts of your body and infect other organs - a process called metastasis. Because cancer destroys organs, it is considered a life-threatening condition and early detection is. Diverticulosis is the condition of having multiple pouches (diverticula) in the colon that are not inflamed. These are outpockets of the colonic mucosa and submucosa through weaknesses of muscle layers in the colon wall, and may be due in part to low-fiber diet prompting changes in intestinal microflora with consequent low-grade inflammation. Diverticula do not cause symptoms in most people This test evaluates the urinary funnel system from the kidneys to the bladder and helps determine where blood in the urine originates. CT Scan to diagnose bladder cancer : A computed tomography (CT) scan of the abdomen and pelvis can show if the urinary funnel system is normal, and if cancer is present, how far it has spread outside the bladder

A CT scan can be used to measure the tumor's size. Sometimes a special dye called a contrast medium is given before the scan to provide better detail on the image. This dye can be injected into a patient's vein or given as a pill or liquid to swallow. In a person with colorectal cancer, a CT scan can check for the spread of cancer to the. Angiography may also be done. In this procedure dye that can be detected by x-ray is injected into the arteries of the intestines. If the bleeding is active, some dye may be seen leaking into the colon. While diverticulitis almost always involves the left or sigmoid colon, most diverticular bleeding occurs in the right side of the colon udy was to determine the accuracy of CT staging in proximal colon cancer in detecting unfavorable pathologic features that may aid in the selection of ideal candidates alternative treatment strategies, including extended lymph node dissection and/or neoadjuvant chemotherapy. DESIGN: This was a retrospective consecutive series. SETTINGS: Trained abdominal radiologists from 2 centers performed a. Virtual colonoscopy. A virtual colonoscopy, also known as CT colonography, is a procedure used to take images of the inside of your large bowel, using a CT scan. It's used to check your large bowel for polyps (growths on the bowel lining) or signs of cancer, and to investigate symptoms affecting your bowel CT Exams Contrast vs Non-Contrast Guide These suggestions are general guidelines that apply to the use of contrast for CT exams provided at Oregon Imaging Centers. If you have questions about ordering your patient's CT, we encourage you to speak with a radiologist about the study and the need for contrast. Speak with a Radiologist: 541-284-401

Many doctors recommend an annual CT scan for those at high-risk for lung cancer. This scan is more effective in detecting the disease early in its course when it is treatable Continuing along with my great diverticulitis adventure (or, How I spent the Spring of 2015 in Colorado), yesterday I took another trip to the ER, had another CT scan, and to my great surprise I found out that I don't have diverticulitis, but instead I have something called Epiploic appendagitis:. Epiploic appendagitis. As a patient, I can tell you that epiploic appendagitis feels a. It may not be possible to tell the difference between diverticulitis and perforated colon cancer on imaging alone. Diverticulitis complicated by abscess will need drainage of the infected collection. In many cases, this may be done by an Interventional Radiologist, with CT guidance Seizures. Seizures can be a sign of brain tumors in cats, most often seen in older cats with cancer, says Dr. Zaidel. If you start to notice sudden and uncontrolled bursts of activity, like. A bone scan may detect cancer that has metastasized to the bone from a different primary site, such as the breast, prostate or lungs. Colonoscopy. A colonoscopy is generally used to examine the large intestine (or colon) for the presence of colorectal cancer. Learn more about colonoscopies. Computed tomography (CT) scan