Question

A new test can screen someone with a family history for a particular type of aggressive cancer through genetic testing. Those that inherit this genetic marker, or 'cancer gene', from one or both of their parents will have a much greater risk of getting this cancer. Would you recommend this genetic screening? Why or why not?

Answer 1

Genetic screening very important in our life. Its my openion .because Genetic screening is the process of testing a population for a genetic disease in order to identify a subgroup of people that either have the disease or the potential to pass it on to their offspring.

Genetic testing involves examining your DNA ,the

Chemical database that carries instructions for your body's functions.Genetic testing can reveal changes (mutations) in your genes that may cause illness or disease.

Although genetic testing can provide important information for diagnosing ,treating and preventing illness. There are limitations .for examples if you're healthy person ,a positive result from genetic testing doesn't always mean you will develop a disease.on the other hand,in some situations, a negative result doesn't guarantee that you won't have a certain disorder.

WHY IT'S IMPORTANT

Genetic testing plays a vital role in determining the risk of developing certain disease as well as screening and some times mediacl treatment.Different types of genetic testing are done for different reasons.

* Diagnostic testing

If your have symptoms of a disease that may be caused by genetic changes ,some times is called mutated genes ,genetic testing can reveal if you have the suspected disorder .for example,genetic testing may be used to confirm a diagnosis of cystic fibrosis or Huntington's disease.

* presymotomatic and predictive testing.

If you have the family history of genetic condition ,getting genetic testing before you have the symptoms may show if you're at risk of developing that condition.for eg, this type of testing may be useful for identifying your risk of certain types of colorectal cancer.

* Carrier testing.

If you have a family history of a genetic disorder - such as sickle cell anemia or cystic fibrosis - or you're in an ethinic group that has a high risk of a specific genetic disorder, you may choose to have genetic testing before having children.An explained carrier screening test can detect genes associated with a wide variety of genetic disease and mutations and can identify if you and your partner are carriers for the same conditions.

* pharma co genetics.

If you have a particular health condition or disease,this type of genetic testing may help determine what medication and dosage will be most effective and beneficial for you.

* Prenatal testing.

If you're pregnant ,tests can detect some type of abnormalities is in you're baby's gene .Down syndrome and trisomy 18 syndrome are two genetic disorders that are often screened for as part of prenatal genetic testing.

Traditionally this is done looking at markers in blood or by invasive testing such as amniocentesis.Newer testing called cell - free DNA testing looks at a baby's DNA via a blood test done on the mother.

* Newborn screening.

This is most common type of genetic testing.in the united states ,all states require that newborns be tested for certain genetic and metabolic abnormalities that cause specific conditions. This type of genetic testing important because if results show there's is a disorder such as congenital hypothyroidism, sickle cell disease or phenylketonuria ,care and treatment can begin right away.

* preimplantation testing.

Also called preimplantation genetic diagnosis,this test may be used when you attempt to conceive a child through in vitro fertilization.the embryos are screened for genetic abnormalities are implanted in the uterus in hopes of achieving pregnancy .

Some peoples why not recommend genetic screening?

* testing may increase anxiety and stress for some individuals.

* testing does not eliminate a person's risk for cancer.

* Result in some cases may return inconclusive or uncertain.

* prenatal testing may be risk of losing miscarriage.

* many of the risks associated with genetic testing involve the emotional,social,or financial consequences of the test results.