Genetic
counseling is provided by a team of health professionals who work together
to provide an individual or family with current information and supportive
advice or guidance regarding growth and developmental health problems
due to genetic condition or any other inherited disorders. This assists
families and individuals to understand and adjust to the diagnosis of
a genetic condition that they encounter.
Genetic counseling provides
- Information
- Supportive counseling regarding the diagnosis and risk of
a genetic condition in the family
- Prescribe diagnostic, carrier, predictive and presymptomatic
genetic testing where appropriate
- Genetic counseling provides Management plans for the conditions
if needed
The health professional team providing genetic counseling may consist
of clinical geneticists or other medical specialists, genetic counselors
and social workers. Genetic counseling is provided as part of a comprehensive
genetics service whose elements include clinical evaluation, laboratory
testing and health education.
Genetic counselors
Genetic counselors provide genetic counseling as part of a multi-disciplinary
team. Some work in `outreach’ and are linked to a major genetics unit.
Genetic counselors include:
- Clinical geneticists and other specialist medical practitioners
with expertise in the medical genetics eg oncologists and neurologists.
- Genetic counselors can also be health professional
graduates with specialist training and certified to provide genetic
counseling.
- Social workers with a special interest in genetics
and particular genetic conditions, work closely with clinical geneticists,
genetic counselors and support groups.
Genetic
counseling process include:
When there is a condition that runs in a family then individuals are
concerned that they or their children will develop the condition
Where a previous child is affected by a serious problem in growth, development
or health
Where one or more family members (blood relatives not related by marriage)
have unusual features, or a serious health problem
Where a woman is in her mid 30s or older and is either planning a pregnancy
or is already pregnant for the first time
When couples are blood relatives
Where an individual or their partner has some concerns about a condition
in themselves or their family being passed on to their children
When a fetal abnormality is detected during pregnancy
When there is concern about exposure to some environmental agent such
as drugs, medications, chemicals or radiation that might cause birth defects
Genetic counseling covers various conditions and is becoming important
day by day. Currently there are three major diagnostic areas where counseling
has been most effective. These are:
- Premarital and prenatal counseling
- General and paediatric counseling
- Cancer genetic counseling
1.
Premarital and prenatal counseling
Inherited genetic conditions are a major concern for couples planning
a family especially those with consanguinity or members of a high risk
family. Counseling can help them to chose the correct analyses to assess
their reproductive health status or rule out of carrier status for any
genetic disorders.
Prenatal genetic counselors work with individuals, couples, or families
who are at increased chance of having a child with a birth defect or genetic
condition. Those who are already pregnant or are considering having a
child in the future can meet with a prenatal genetic counselor to learn
more about the condition in question, understand their risks more clearly,
and discuss options for prenatal screening, testing, and/or assisted reproduction
techniques. During pregnancy, if a baby is found to have a birth defect
or genetic condition you may be referred to a prenatal genetic counselor.
The counselor will help the expecting couple understand the medical condition,
what to expect, and how to prepare for the birth of a child with special
needs, as well as discuss options such as pregnancy termination or in
utero treatment if available or adoption.
Prenatal counselors also help many families who do not have an increased
risk of having a child with a birth defect or genetic condition, understand
prenatal screening and testing options. Procedures such as ultrasounds,
blood tests may be able to give a better idea if a developing baby has
a chance of having birth defects or a genetic condition.
2. General and pediatric counseling
Designated genetic clinics serve children, adults, and families with known
or suspected genetic conditions and birth defects. Some clinics serve
both children and adults; whereas, others serve primarily children (pediatric
genetics clinics) or adults (adult genetics clinics). A team of physicians
and genetic counselors are available to diagnose and provide support and
help for those with any genetic condition. Some families start out in
a general genetics clinic and, if a diagnosis can be made, they may then
be referred to a specialty clinic.
3. Cancer genetic counseling
Some cancers run in families. If anyone have had cancer at a young age,
had two or more separate cancers, or have several family members that
have had cancer, he may want to think about genetic counseling and perhaps
genetic testing.
A cancer genetic counselor will evaluate the family health history and
talk about risks for inherited cancer, as well as screening and management
for those at increased risk. If genetic testing is available, the counselor
will tell about the tests and help to decide if testing would be useful
to him.
If anyone have had cancer, genetic testing may be useful to him and his
medical team for making decisions about cancer management.
People having no history of cancer, it can help him to understand the
risk for cancer and the risks for other members of the family.
In both cases, genetic testing will help the patient and his medical team
make decisions about cancer screening and cancer detection and management.
It could also provide useful information for the family members about
their cancer risks.
A genetic counselor can also refer to support resources for people with
cancer, an increased chance of cancer, or family histories of cancer.
Eastern Biotech & Life Sciences offers pre and post diagnostic genetic
counseling for the following condition:
- Pre marital Screening
- Prenatal Screening
- Neo natal Screening
- Cervical cancer screening
- Breast cancer screening
- Personal genome profiling
- DNA test for molecular & cytogenetic test
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- Best time for genetic counseling is before pregnancy ( Genomics
and Genetics Weekly, 2004)
The best time for a woman to seek genetic counseling for heritable conditions
is before she becomes pregnant, but at the University of Amsterdam's Department
of Clinical Genetics, between 10% and 20% of women seek such a consultation
during their pregnancy.
Geneticists there gathered information from women attending the clinic
to determine why some women wait to seek genetic counseling.
Consecutive pregnant (n = 100) and non-pregnant (n = 84) women visiting
the Department of Clinical Genetics for a genetic risk factor which was
not age related completed a questionnaire immediately prior to the consultation.
- Study: Software Can Provide Bare-Bones Genetic Counseling
(Healthcare IT, 2004)
Women unlikely to carry certain cancer mutations may be able to get
the information they need from a computer interface, but the flesh-and-blood
type are more effective at helping women understand their risk of getting
cancer.
Only about 400 genetic counselors nationwide specialize in cancer, and
most are in urban areas. Meanwhile, the availability of and demand for
genetic tests to detect inherited cancer risk are increasing, according
to the researchers. That leaves many women who are concerned about their
cancer risk without access to a counselor who can help them decide whether
to go through with genetic testing. Computer programs could help fill
this gap, postulated the researchers.
The study compared the effectiveness of an interactive computer program
to standard genetic counseling for educating women about genetic testing.
Just over 200 women with personal or family histories of breast cancer
were assigned as having a "high" (over 10 percent) or "low"
(under 10 percent) chance of carrying the BRCA1 or BRCA2 mutation, which
makes carriers more likely to have breast cancer.
Women in each group were randomly assigned to meet directly with a genetic
counselor or to work with a computer program before meeting with a genetic
counselor. Surveys before and after each session as well as one month
and six months after the study assessed participants knowledge, risk
perception, intention to undergo genetic testing, decisional conflict,
satisfaction with decision, anxiety and satisfaction with the intervention.
The computer program allowed patients to work at their own pace and
reread sections as desired.
The computer program was more useful as compared to the counseling by
the counselors for the women with low risk mutations. However, genetic
counseling was more effective for to reduce the anxiety of womens anxiety
and help them to assess their risk of getting breast cancer.
"These results suggest that the computer program has the potential
to stand alone as an educational intervention for low-risk women, but
should be used in combination with one-on-one genetic counseling for
women at high risk," said Michael Green, M.D., M.S., associate
professor of humanities and medicine at Penn State College of Medicine,
who led the study. Dr. Green has also received royalties from sales
of the CD-ROM of the program, which is made available through Medical
Audio Visual Communications Inc.
Angela Musial, a cancer genetic counselor at California Pacific Medical
Center in San Francisco, said she can envision the program as part of
the referral process. "Patients might use it in their primary care
physicians, gynecologists or oncologists office to determine if they
are candidates for genetic counseling and possible genetic testing,"
she said. Also she added that such programs might supplement genetic
counseling, but could not replace it..
- Genetic Counseling and Testing for Breast Cancer Affected
by Family Communication: Study (MedIndia, March, 2008)
A recent preliminary study that was presented at the American Society
for Preventive Oncology meeting in Bethesda, Md has said that willingness
of relatives to talk about their family’s cancer history affects the
attitude and knowledge about genetic counseling apart from the testing
for those who are at moderate risk for developing breast cancer.
Prior research has shown that African Americans participate less as
compared to Caucasians in genetic counseling for breast cancer gene
testing. So when they are diagnosed, often they are in an advanced stage
of breast cancer and thus are more likely to die from the disease.
“It’s important to understand the benefits of counseling so that we
can address better,” said Kristi D. Graves, Ph.D., a clinical psychologist
in the Cancer Control program at the Lombardi Comprehensive Cancer Center,
part of Georgetown University Medical Center. “In this study, we evaluated
the impact of socio-cultural variables on knowledge and attitudes about
BRCA 1/2 counseling and testing. We hope to use this information to
understand why there’s a difference in testing uptake among black and
white women.”
Researchers conducted telephone interviews with 105 women who had a
negative breast biopsy history and one or more relatives with breast
and/or ovarian cancer (75 Caucasians, 30 African Americans). The researchers
assessed cancer history, perceived risk, worry, medical mistrust, cancer
fatalism, family/physician communication, race-based experiences, and
knowledge and attitudes toward BRCA 1/2 testing.
After controlling for education, income, and socio-cultural variables
like medical mistrust and cancer fatalism, it was noticed that there
was no statistical difference in knowledge and attititds between African
-American and Caucasian women.It was noted that the more family members
the women talked with, the level of knowledge about genetic counseling
and testing increased.
It was found that those who felt more vulnerable, because they perceived
a greater risk of developing breast cancer, had less positive attitudes
about genetic testing.
- Many High-Risk Women Refuse Breast MRI (Health day, Dec
2009)
MRI is suggested to detect cancer at an early stage in addition
to annual memmogram. Yet, 42 percent of such women in a new
study said no to the test.
"We were surprised that so few women wanted to have MRI, even though
it was no cost to them," said study author Dr. Wendie A. Berg,
a breast imaging specialist at Johns Hopkins' Green Spring Station in
Lutherville, Md.
Berg and her colleagues offered 1,215 women at high or intermediate
risk of breast cancer an MRI for screening, but 512 women refused the
test. They cited claustrophobia, time problems and reluctance to have
the contrast medium injected as some of their reasons. They also mentioned
financial concerns and the need to travel to get the test.
In an MRI, a powerful magnetic field, radio frequency pulses and a computer
produce detailed pictures of organs, soft tissues, bone and other structures.
MRI is often used to evaluate the heart, liver, kidney, spleen, pelvic
organs, blood vessels and breasts.
In the Berg study, the acceptability of the test was lower than expected,
said Robert Smith, director of cancer screening for the American Cancer
Society (ACS). "I would think most women would accept the test
if their doctor suggested it," he said.
The study is published in the January issue of Radiology.
Smith said he was surprised that claustrophobia was cited more often
-- by 25.4 percent of the women -- than reluctance to inject the contrast
material -- 5.3 percent.
The ACS recommends MRI plus mammograms annually beginning at age 30
for certain groups of women with a high risk of getting breast cancer,
which is defined as more than a 20 percent lifetime risk. For instance,
those with the genetic mutation known as BRCA1 or 2 would be candidates
for getting both.
In the study, some of the women were at intermediate, not high risk,
of breast cancer, Smith noted. But Berg said that there is a gray area
about what to do with intermediate-risk women as far as adding MRI to
their screening program. "There is some evidence that it's of value
for intermediate-risk women," she explained. Berg said genetic
counseling would be of benefit for some women who are unsure if they
are at very high risk of breast cancer. For instance, women who may
benefit from genetic counseling and possibly testing for the BRCA1 or
2 mutations include those who are first-degree relatives of a known
BRCA mutation carrier and those who have a male family member with breast
cancer.
"I think the researchers need to understand a little better what
is behind the rejection, and how it might be overcome," Smith said.
Berg suspects that once awareness of the value of MRI is raised and
more women know it increases cancer detection, there will be a greater
interest in getting the test.
- Genetic disease testing leads some adults to chose only healthy
offsprings (USA Today, Feb, 2010)
Many of these diseases are little known and few statistics are kept.
But their effects — ranging from blood disorders to muscle decline —
can be disabling and often fatal during childhood.
Now, more women are being tested as part of routine prenatal care, and
many end pregnancies when diseases are found. One study in California
found that prenatal screening reduced by half the number of babies born
with the severest form of cystic fibrosis because many parents chose
abortion.
More couples with no family history of inherited diseases are getting
tested before starting families to see if they carry mutations that
put a baby at risk. And a growing number are screening embryos and using
only those without problem genes.
The cost of testing is falling, and the number of companies offering
it is rising. A 2008 federal law banning gene-based discrimination by
insurers and employers has eased fears.
The conference faculty recognized the spectacular progress of medicine
in the modern era, which has led to the discovery of new cases of congenital
abnormalities and genetic disorders prenatally.
The conference faculty also recommended the popularization of genetic
sciences as a major step towards limiting the spread of genetic disorders
in the region.
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