A federal study waited a long time for an
alternative to X-ray dreaded colonoscopy confirms its effectiveness in check
most cancers, even though it was far from perfect.
The cheapest option less
intrusive might persuade more people to be investigated for cancer of the
And some experts believe that the new method can increase the rate of the
investigation of 50 percent for cancer that is a murderer second largest
"We talked for the first time really in the investigation of the
population," said Dr. Carl Jaffe, an expert on imaging the National Cancer
Institute who was not involved in the investigation.
In the new study, the largest of its kind, the so-called "virtual
colonoscopy" identified nine out of 10 people who had cancer and the
growths seen by large regular colonoscopies.
But there was damage, too. Among them: The radiologists read wrong
sometimes radiography, the leading mark polyps that were not there. That
led to unnecessary follow-up test.
The value of the real test of the x-ray can be in the action that really
needs a regular colonoscopy - was preferable in ruling out cancer in that
discernment, suggests the report in the New England Journal of Medicine on
Colorectal cancer claim about 50,000 lives this year. The point of the
investigation, widely recommended at the age of 50 years, is to find
growths before they turn cancerous.
Colonoscopy is the gold standard, in which a long, thin tube equipped with
a small camcorder is Meander along the large intestine see the forum. Any
growth can be removed during the procedure.
It involves sedation and a day lost from work, not to mention the
preparation that uses pills or liquids to clean the intestines.
The study focused on CT colonography, also known as virtual colonoscopy.
It's a super X-ray of the colon that is faster, cheaper and easier on the
patient that traditional colonoscopies.
It also requires the cleansing of intestines and has a potentially serious
problem - radiation.
Colonoscopies costing up to $ 3,000. The test of the X-ray costs $ 300 to
$ 800; most insurers do not cover so far, but the federal Medicare
insurance program for the retiree is considering.
Insurers likely weighed heavily in the new study by reach their decisions,
said Dr.. Brooks lasted, which oversees the programs of colorectal and
prostate cancer at the American Cancer Society.
The preliminary, unpublished data from the new study and helped persuade
the company to turn off cancer and other patterns in March that added
virtual colonoscopy and a stool DNA test recommended to the arsenal of
research for colon cancer, said the Arroyos .
In the new study, that the standard colonoscopy and X-ray test were given
to 2531 people in 15 medical centers in the U.S.
The scrutinized shown great growth in about one in every six people,
although some false alarms were not confirmed by colonoscopy.
Of the patients with growths checked by colonoscopy, 90 percent was noted
by radiography escudri'a.
"That is very good news," said Dr. C. Daniel Johnson, the lead author of
the study. He is a researcher at the campus of Mayonnaise Clinic in
Scottsdale, Arizona, with financial ties to a virtual colonoscopy, GE
Support to false alarms - one in four of those patients diagnosed with a
growth had a really, MD. Robert Fletcher noticed, a retired professor of
Faculty of Medicine at Harvard who wrote an editorial accompanying the
study. He is a paid consultant for a company that makes a test of DNA
research for cancer of the colon.