Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

CT colonography versus colonoscopy for colorectal cancer

11.10.2005


Colorectal cancer is the second leading cause of cancer deaths in most developed countries. Screening for colorectal malignancies and polyps (which frequently become cancerous) has been shown to lower the number of deaths from cancer. Most cancer societies and preventive task forces recommend regular screening for cancer of the colon.

Physicians often recommend colonoscopy for screening. Unfortunately, this procedure is uncomfortable and occasionally results in perforation of the colon, sometimes leading to death.

CT colonography is a relatively new imaging technology that can be used to examine the large bowel and rectum where these cancers occur. It is a noninvasive technique that reveals cancer lesions and polyps with nearly the same sensitivity and specificity as colonoscopy, without the risks of bowel perforation.



This study by Heitman and colleagues compares the costs and effectiveness of these two approaches to screening, using assumed prevalences of polyps and cancers among average-risk individuals 50 to 74 years of age. They found that screening 100 000 patients with CT colonography would cost $2.3 million more (in Canadian dollars) than with colonoscopy, and would avoid 3.8 fatal perforations -- but at the same time, this method would lead to 4.1 cancer-related deaths from polyps not seen with CT, which would later become malignant. (Colonoscopy is slightly more sensitive than CT colonography, and could be expected to detect a certain number of polyps that the CT method would miss.)

New technologies are always attractive. Because CT colonography does not physically invade the body, it has even more appeal -- it is easier for patients to accept. Its cost, however, is much higher, and its benefit (in terms of years of living that are gained) is only slightly lower than when colonoscopy is used.

Dr. Joseph Romagnuolo | EurekAlert!
Further information:
http://www.musc.edu

More articles from Health and Medicine:

nachricht 'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers
16.02.2018 | National University of Science and Technology MISIS

nachricht New process allows tailor-made malaria research
16.02.2018 | Eberhard Karls Universität Tübingen

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

'Lipid asymmetry' plays key role in activating immune cells

20.02.2018 | Life Sciences

MRI technique differentiates benign breast lesions from malignancies

20.02.2018 | Medical Engineering

Major discovery in controlling quantum states of single atoms

20.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>