Navigation Links
Virtual colonoscopy allows detection of unsuspected cancers beyond colon
Date:3/22/2010

OAK BROOK, Ill. A new, large-scale study of more than 10,000 adults found that more than one in every 200 asymptomatic people screened with CT colonography, or virtual colonoscopy, had clinically unsuspected malignant cancer and more than half of the cancers were located outside the colon. The findings were published in the April issue of the journal Radiology.

"We are finding that virtual colonoscopy screening actually identifies more unsuspected cancers outside of the colon than within it," said lead author Perry J. Pickhardt, M.D., professor of radiology and chief of GI Imaging, at the University of Wisconsin School of Medicine & Public Health. "As with asymptomatic colorectal cancers identified by virtual colonoscopy screening, these cancers are often detected at an early, curable stage."

Colorectal cancer remains the second leading cause of cancer death in the U.S., and the National Cancer Institute estimated that there would be 146,970 new cases diagnosed in 2009 and 49,920 deaths. The disease is largely preventable through screening for colon polyps, which are benign growths that may develop into cancer if not removed. The American Cancer Society recommends that people at average risk for colorectal cancer begin regular colorectal cancer screening at age 50, but current compliance with this recommendation is below 50 percent. Many people resist screening because of the discomfort and inconvenience caused by the conventional optical colonoscopy test.

Virtual colonoscopy is less invasive than optical colonoscopy and produces precise and detailed "fly-through" images of the entire colon's interior without having to insert a scope. With virtual colonoscopy screening, there is essentially no risk of bleeding or of perforating the colon. There is no need for intravenous sedation, and the procedure is less costly than conventional optical colonoscopy. It also is more convenient, typically taking 10 minutes or less.

Virtual colonoscopy also allows for limited assessment of structures outside the colon (extracolonic), including the abdomen, pelvis and portions of the lungs. Additional diagnostic tests for unsuspected extracolonic findings are performed in about 6 percent of cases, nearly half of which ultimately prove to be clinically relevant.

"Optical colonoscopy cannot provide for any assessment beyond the colon itself, whereas virtual colonoscopy can detect a wide array of unsuspected extracolonic diseases, most notably cancers and aortic aneurysms," Dr. Pickhardt said.

For the study, Dr. Pickhardt and colleagues set out to determine the detection rate and clinical outcome of unsuspected malignancies detected with virtual colonoscopy in an asymptomatic screening population. The researchers retrospectively reviewed the medical records of 10,286 adults (5,388 men and 4,898 women) with a mean age of 59.8 years who were evaluated at either the University of Wisconsin or National Naval Medical Center. All of the adults had undergone colorectal cancer screening with virtual colonoscopy at the two centers between April 2004 and March 2008. The mean time for follow-up was 30.2 months.

Unsuspected cancer was confirmed in 58 patients, including 33 women and 25 men. Invasive colorectal cancer was found in 22 patients, and extracolonic cancer was found in 36 patients. Cancers in 31 patients (53.4 percent) were stage 1 or localized cancers.

"To our knowledge, none of the patients who presented with stage 1, stage 2 or localized disease at diagnosis has progressed to a higher stage," Dr. Pickhardt said. "The fact that so many of the cancers in our study were localized or detected at an early stage appears to have positively affected survival."

Extracolonic malignancies, which outnumbered cases of invasive colorectal cancer, included renal cell carcinoma, lung cancer and non-Hodgkin lymphoma, among others.

"Although extracolonic evaluation at screening CT colonography does carry some disadvantages, such as patient anxiety, inconvenience, or the potential for benign biopsy, our results suggest that early detection of asymptomatic extracolonic cancer represents an additional benefit of screening CT colonography that is not available with optical colonoscopy," Dr. Pickhardt said.

"Virtual colonoscopy is an accurate, safe and convenient screening test that could potentially be a life-saving examination," he added.


'/>"/>

Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

Related medicine news :

1. Virtual Global Launches Cloudipedia.com to Help Cloud Computing Newbies
2. Virtual Colonoscopy a Good Bet for Elderly
3. Ifbyphones Virtual Call Center Software Saves DiabetesAmerica Over $240,000 Per Year
4. Half-Million Doctors Beg Senate to Kill the Bill - Virtual News Conference by Coalition of More Than 40 Medical Groups Sunday, 2 pm EST; Sweetheart Deals Punish Patients in Other States
5. Left/Right Healthcare Virtual Vigil Tonight at 9 PM Until Senate Votes; Broad Coalition Says Punishes Some States, Windfall for Insurance Companies
6. Sudden Cardiac Arrest Foundation Launches First Virtual Affiliate
7. Long Island Plastic Surgical Practice - the Largest in the U.S. - Opens Virtual Doors on a New, State-of-the-Art Website
8. First Global, Virtual Summit on Cognitive Health and Performance Features 200 Sharp Brains
9. Virtual Global Highlights Top Ten Misconceptions about Cloud Computing
10. Virtual reality and other technologies offer hope
11. New Virtual Program for Parents of Children with ADD / ADHD
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center for ... Table in Battle Creek, MI, where the rehabilitation facility is located. This annual celebration ... world’s leading providers of cereal and other breakfast foods. Its residents often refer to ...
(Date:6/26/2016)... Orion, Clarkston, Michigan (PRWEB) , ... June 26, ... ... with respect to fertility once they have been diagnosed with endometriosis. These women ... intercourse but they also require a comprehensive approach that can help for preservation ...
(Date:6/25/2016)... ... June 25, 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX users ... - CEO of Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 ... Pro X . Simply select a ProHand generator and drag it above media or ...
(Date:6/25/2016)... ... ... On Friday, June 10, Van Mitchell, Secretary of the Maryland Department of Health and ... their exemplary accomplishments in worksite health promotion. , The Wellness at Work Awards took ... the BWI Marriott in Linthicum Heights. iHire was one of 42 businesses to receive ...
(Date:6/24/2016)... ... 24, 2016 , ... June 19, 2016 is World Sickle Cell Observance Day. ... the benefits of holistic treatments, Serenity Recovery Center of Marne, Michigan, has ... , Sickle Cell Disease (SCD) is a disorder of the red blood cells, which ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... Va. , June 24, 2016 The ... set of recommendations that would allow biopharmaceutical ... (HCEI) with entities that make formulary and coverage decisions, ... the "value" of new medicines. The recommendations ... does not appear on the drug label, a prohibition ...
(Date:6/24/2016)... June 24, 2016 According to ... Type (Standard Pen Needles, Safety Pen Needles), Needle Length ... Growth Hormone), Mode of Purchase (Retail, Non-Retail) - Trends ... report studies the market for the forecast period of ... USD 2.81 Billion by 2021 from USD 1.65 Billion ...
(Date:6/23/2016)... , June 23, 2016  MedSource announced today ... its e-clinical software solution of choice.  This latest ... possible value to their clients by offering a ... preferred relationship establishes nowEDC as the EDC platform ... MedSource,s full-service clients.  "nowEDC has long been a ...
Breaking Medicine Technology: