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VOA标准英语2014--新型检测非侵入性结肠癌准确度达94%

时间：2014-10-02 14:58:17

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New Non-invasive Colon1 Cancer Test Claims 94% Accuracy 新型检测非侵入性结肠癌准确度达94%

According to the World Cancer Research Fund and the American Institute for Cancer Research, colorectal cancer is the third most common cancer worldwide and the fourth most common cause of death for both men and women. Survivability rises if it is diagnosed early enough. A new type of test promises to replace the dreaded2 colonoscopy as the most reliable method for doing that.

Doctors say the most reliable test for colon cancer is a colonoscopy -- looking inside the patient’s large intestine3. With a special instrument, they can look for potentially deadly polyps and remove them on the spot.

But University of Miami oncologist Ike Akunyili said the procedure is not a popular one. “You have to put something through somebody's behind and lot of people don't like it.”

That is why many patients opt4 for the less invasive fecal occult blood test, which can be done at home, but is less reliable. It cannot detect polyps and even misses some cancers.

But a new way to test stool samples, called Cologuard, claims to be 94 percent accurate in identifying colorectal cancer.

Akunyili said this is especially good news for patients who avoid colonoscopies.

“It might increase uptake and make more people who are hesitant about getting screened, get screened,” he said.

Patients can collect a stool sample at home and send it to a laboratory, where it is screened for three genetic5 markers associated with polyps or early stage tumors.

Mayo Clinic gastroenterologist David Alquist said the new test may lead to fewer colorectal cancer cases, just as the PAP Smear6 test lowered the number of cervical cancer cases.

“There is no reason why application of Cologuard broadly through our population couldn't achieve the same thing for colon cancer. Our goal is to eradicate7 colon cancer,” said Alquist.

As screening for genetic markers becomes more sophisticated, doctors say the test soon may be able to identify other gastrointestinal cancers.


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1 colon jqfzJ     
n.冒号，结肠，直肠
参考例句：
  • Here,too,the colon must be followed by a dash.这里也是一样，应当在冒号后加破折号。
  • The colon is the locus of a large concentration of bacteria.结肠是大浓度的细菌所在地。
2 dreaded XuNzI3     
adj.令人畏惧的；害怕的v.害怕，恐惧，担心( dread的过去式和过去分词)
参考例句：
  • The dreaded moment had finally arrived. 可怕的时刻终于来到了。
  • He dreaded having to spend Christmas in hospital. 他害怕非得在医院过圣诞节不可。 来自《用法词典》
3 intestine rbpzY     
adj.内部的；国内的；n.肠
参考例句：
  • This vitamin is absorbed through the walls of the small intestine.这种维生素通过小肠壁被吸收。
  • The service productivity is the function,including external efficiency,intestine efficiency and capacity efficiency.服务业的生产率是一个包含有外部效率、内部效率和能力效率的函数。
4 opt a4Szv     
vi.选择，决定做某事
参考例句：
  • They opt for more holiday instead of more pay.他们选择了延长假期而不是增加工资。
  • Will individual schools be given the right to opt out of the local school authority?各个学校可能有权选择退出地方教育局吗？
5 genetic PgIxp     
adj.遗传的，遗传学的
参考例句：
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
6 smear 6EmyX     
v.涂抹；诽谤，玷污；n.污点；诽谤，污蔑
参考例句：
  • He has been spreading false stories in an attempt to smear us.他一直在散布谎言企图诽谤我们。
  • There's a smear on your shirt.你衬衫上有个污点。
7 eradicate Ui1zn     
v.根除，消灭，杜绝
参考例句：
  • These insects are very difficult to eradicate.这些昆虫很难根除。
  • They are already battling to eradicate illnesses such as malaria and tetanus.他们已经在努力消灭疟疾、破伤风等疾病。

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