Navigation Links
Fecal Blood Tests Effective at Spotting Colon Cancer

But they are underused, experts say

TUESDAY, Sept. 25 (HealthDay News) -- A new generation of fecal blood tests can screen for colon cancer with unprecedented accuracy, researchers report.

But the tests, although easily available, are greatly underused, said study author Dr. James Allison, an investigator with the Kaiser Permanente division of research in Oakland, Calif.

"A lot of gastroenterologists think that colonoscopy is the only test for colon cancer," Allison said.

But colonoscopy is also expensive, uncomfortable and carries the risk of damage such as internal bleeding, he said. A simple fecal occult blood test, costing less than $30 and done in minutes, can single out that small percentage of the general population that would benefit from colonoscopy, Allison said.

The study is published in the Sept. 25 issue of the Journal of the National Cancer Institute.

At least 10 fecal occult blood tests have been approved by the U.S. Food and Drug Administration, Allison said. The most widely used is Hemoccult, which has been shown in controlled trials to reduce mortality from colorectal cancer.

The two tests described in the new journal report use different methods to detect hidden blood. "Each one has different pluses and minuses," Allison said. "We need to find out which is best -- which we should be using in the United States and elsewhere."

One of the tests described in the journal report uses guaiac, the chemical in Hemoccult, as a detector. The other uses an immunochemical method. Screening of 5,841 people showed the immunochemical test to have a sensitivity of 81.8 percent, meaning that it detected that percentage of colorectal cancers and polyps. And it had a specificity -- the ability to determine which people did not have the conditions -- of 96.9 percent. The guaiac test was 64.3 percent sensitive and 90.1 percent specific.

Allison has been conducting something of a crusade to promote use of fecal occult blood tests to screen for colorectal cancer. "I am doing a tour of the United States and talking to primary-care physicians," he said.

Use of the tests not only saves lives but also reduces incidence of colorectal cancer by permitting removal of precancerous polyps, said Jack Mandel, chairman of the department of epidemiology at Emory University, who wrote an accompanying editorial in the journal.

"We did the first large study at the University of Minnesota in 1993 to show that fecal blood testing reduces mortality," Mandel said. "There were 50,000 people in that trial. Two years later, we showed that testing reduced the incidence of colorectal cancer."

Robert Smith, director of cancer screening for the American Cancer Society, said, "We recommend both guaiac-based tests and immunochemical tests. We recommend them for all adults age 50 and over."

No preference between the two methods is stated, because "at the time our last guidelines were updated, there was no clear advantage of one over another," Smith said.

"The challenge has been to get folks to use them, in particular to get doctors to adopt them in the office," he said.

More information

To learn more about colorectal cancer screening, visit the U.S. National Cancer Institute.

SOURCES: James Allison, M.D., investigator, Kaiser Permanente division of research, Oakland, Calif.; Jack Mandel, Ph.D., chairman of epidemiology, Emory University, Atlanta; Robert Smith, Ph.D., director of cancer screening, American Cancer Society, Atlanta; Sept. 25, 2007, Journal of the National Cancer Institute

Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Is Prior Testing Necessary For Diagnosis And Treatment Of Fecal Incontinence (FI) ?
2. Fecal Bacteria, a Source of Contamination
3. Recommendations for Treatment of Blood Pressue
4. Blood Cells Capable of Regenerating Liver
5. Infant receives first bloodless liver transplant
6. Spouses and other partners lower blood pressure says new research
7. H2O - a cure for low blood pressure
8. Uncontrolled blood pressure
9. Weight and Blood Pressure
10. Grandmother’s diet in pregnancy can affect grandchildren’s blood sugr
11. Early diagnosis for autism from blood tests may be possible
Post Your Comments:
(Date:11/25/2015)... , ... November 25, 2015 , ... “While riding the ... inventor, from Bronx, N.Y. “I thought there had to be a convenient and comfortable ... PROTECTOR. , The PROTECTOR enables disabled individuals to safely travel during cold or inclement ...
(Date:11/25/2015)... ... November 25, 2015 , ... ... that it has undertaken significant expansion of its current state of the art ... part of PharmaTech’s strategy to increase its manufacturing capacity as well as to ...
(Date:11/25/2015)... ... November 25, 2015 , ... Students and parents have something to be thankful ... Create Real Impact awards. California Casualty is proud to support the contest ... distracted and reckless driving, the number one killer of young drivers. , Almost ...
(Date:11/24/2015)... ... ... New patients who wish to seek treatment for missing teeth can now visit ... ON practice. Dr. Williams has been providing dental service for over 34 years, and ... can lead to a variety of complications if they are not replaced quickly, including ...
(Date:11/24/2015)... ... November 25, 2015 , ... ... development solutions for drugs, biologics, consumer health and global clinical supply services, today ... the upcoming Clinical Trial Supply East Asia Conference, to be held at the ...
Breaking Medicine News(10 mins):
(Date:11/24/2015)...  Array BioPharma Inc. (Nasdaq: ARRY ) ... Ron Squarer , will present at the Piper ... public is welcome to participate in the conference ... Jaffray Annual Healthcare ConferencePresenter:  , Ron Squarer, Chief ... Eastern Time Webcast: , ...
(Date:11/24/2015)... NEWPORT NEWS, Va. , Nov. 24, 2015 /PRNewswire/ ... that they have signed an agreement for DILON to ... select geographies across the globe. The signing of this distribution ... GE,s Discovery NM750b Molecular Breast Imaging system and is ... ways to provide better healthcare solutions for clinicians and ...
(Date:11/24/2015)... 2015 . ... adds Latest Guidebook for Chinese Medical Device GMP ... in November 2015 to the medical devices market ... at . China ... global economies with a fifth population in the ...
Breaking Medicine Technology: